diff --git a/src/parser/expression.js b/src/parser/expression.js
index ab94736f2a..2132e71a98 100644
--- a/src/parser/expression.js
+++ b/src/parser/expression.js
@@ -348,6 +348,23 @@ pp.parseSubscripts = function (base, startPos, startLoc, noCalls) {
       node.property = this.parseIdentifier(true);
       node.computed = false;
       base = this.finishNode(node, "MemberExpression");
+    } else if (this.hasPlugin("lightscript") && this.match(tt.elvis)) {
+      // `x?.y`
+      const node = this.startNodeAt(startPos, startLoc);
+      const op = this.state.value;
+      this.next();
+      node.object = base;
+      if (op === "?.") {
+        node.property = this.parseIdentifier(true);
+        node.computed = false;
+      } else if (op === "?[") {
+        node.property = this.parseExpression();
+        node.computed = true;
+        this.expect(tt.bracketR);
+      } else {
+        this.unexpected();
+      }
+      base = this.finishNode(node, "SafeMemberExpression");
     } else if (this.hasPlugin("lightscript") && !noCalls && this.eat(tt.tilde)) {
       const node = this.startNodeAt(startPos, startLoc);
       node.left = base;
diff --git a/src/plugins/lightscript.js b/src/plugins/lightscript.js
index 5a108bbefa..091fe953b6 100644
--- a/src/plugins/lightscript.js
+++ b/src/plugins/lightscript.js
@@ -450,7 +450,8 @@ pp.parseAwaitArrow = function (left) {
 };
 
 pp.tryParseNamedArrowDeclaration = function () {
-  let node = this.startNode(), call = this.startNode();
+  let node = this.startNode();
+  const call = this.startNode();
 
   if (!this.match(tt.name)) return null;
   if (this.state.value === "type") return null;
diff --git a/src/tokenizer/index.js b/src/tokenizer/index.js
index a196b07ea0..186934fa6e 100644
--- a/src/tokenizer/index.js
+++ b/src/tokenizer/index.js
@@ -523,7 +523,16 @@ export default class Tokenizer {
           return this.finishToken(tt.colon);
         }
 
-      case 63: ++this.state.pos; return this.finishToken(tt.question);
+      case 63:
+        if (this.hasPlugin("lightscript")) {
+          const next = this.input.charCodeAt(this.state.pos + 1);
+          // `?.` or `?[`
+          if (next === 46 || next === 91) {
+            return this.finishOp(tt.elvis, 2);
+          }
+        }
+        ++this.state.pos;
+        return this.finishToken(tt.question);
       case 64: ++this.state.pos; return this.finishToken(tt.at);
 
       case 96: // '`'
diff --git a/src/tokenizer/types.js b/src/tokenizer/types.js
index ac5d522443..2857e9475f 100644
--- a/src/tokenizer/types.js
+++ b/src/tokenizer/types.js
@@ -58,6 +58,7 @@ export const types = {
   colonEq: new TokenType(":=", { beforeExpr, isAssign }),
   tilde: new TokenType("~"),
   awaitArrow: new TokenType("<-", { beforeExpr, isAssign }),
+  elvis: new TokenType("?."),
 
   num: new TokenType("num", { startsExpr }),
   regexp: new TokenType("regexp", { startsExpr }),
diff --git a/test/fixtures/lightscript/safe-member-expression/basic/actual.js b/test/fixtures/lightscript/safe-member-expression/basic/actual.js
new file mode 100644
index 0000000000..f45302af16
--- /dev/null
+++ b/test/fixtures/lightscript/safe-member-expression/basic/actual.js
@@ -0,0 +1 @@
+x?.y
diff --git a/test/fixtures/lightscript/safe-member-expression/basic/expected.json b/test/fixtures/lightscript/safe-member-expression/basic/expected.json
new file mode 100644
index 0000000000..062c5f5ff1
--- /dev/null
+++ b/test/fixtures/lightscript/safe-member-expression/basic/expected.json
@@ -0,0 +1,99 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 4,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 4
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 4,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 4
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 4,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 4
+          }
+        },
+        "expression": {
+          "type": "SafeMemberExpression",
+          "start": 0,
+          "end": 4,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 4
+            }
+          },
+          "object": {
+            "type": "Identifier",
+            "start": 0,
+            "end": 1,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 0
+              },
+              "end": {
+                "line": 1,
+                "column": 1
+              },
+              "identifierName": "x"
+            },
+            "name": "x"
+          },
+          "property": {
+            "type": "Identifier",
+            "start": 3,
+            "end": 4,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 3
+              },
+              "end": {
+                "line": 1,
+                "column": 4
+              },
+              "identifierName": "y"
+            },
+            "name": "y"
+          },
+          "computed": false
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/lightscript/safe-member-expression/chained/actual.js b/test/fixtures/lightscript/safe-member-expression/chained/actual.js
new file mode 100644
index 0000000000..4249e41c2a
--- /dev/null
+++ b/test/fixtures/lightscript/safe-member-expression/chained/actual.js
@@ -0,0 +1 @@
+x.y?.a?.b.c[d](e, f)[g]?.h
diff --git a/test/fixtures/lightscript/safe-member-expression/chained/expected.json b/test/fixtures/lightscript/safe-member-expression/chained/expected.json
new file mode 100644
index 0000000000..e6f6c2c71f
--- /dev/null
+++ b/test/fixtures/lightscript/safe-member-expression/chained/expected.json
@@ -0,0 +1,348 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 26,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 26
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 26,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 26
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 26,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 26
+          }
+        },
+        "expression": {
+          "type": "SafeMemberExpression",
+          "start": 0,
+          "end": 26,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 26
+            }
+          },
+          "object": {
+            "type": "MemberExpression",
+            "start": 0,
+            "end": 23,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 0
+              },
+              "end": {
+                "line": 1,
+                "column": 23
+              }
+            },
+            "object": {
+              "type": "CallExpression",
+              "start": 0,
+              "end": 20,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 0
+                },
+                "end": {
+                  "line": 1,
+                  "column": 20
+                }
+              },
+              "callee": {
+                "type": "MemberExpression",
+                "start": 0,
+                "end": 14,
+                "loc": {
+                  "start": {
+                    "line": 1,
+                    "column": 0
+                  },
+                  "end": {
+                    "line": 1,
+                    "column": 14
+                  }
+                },
+                "object": {
+                  "type": "MemberExpression",
+                  "start": 0,
+                  "end": 11,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 0
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 11
+                    }
+                  },
+                  "object": {
+                    "type": "SafeMemberExpression",
+                    "start": 0,
+                    "end": 9,
+                    "loc": {
+                      "start": {
+                        "line": 1,
+                        "column": 0
+                      },
+                      "end": {
+                        "line": 1,
+                        "column": 9
+                      }
+                    },
+                    "object": {
+                      "type": "SafeMemberExpression",
+                      "start": 0,
+                      "end": 6,
+                      "loc": {
+                        "start": {
+                          "line": 1,
+                          "column": 0
+                        },
+                        "end": {
+                          "line": 1,
+                          "column": 6
+                        }
+                      },
+                      "object": {
+                        "type": "MemberExpression",
+                        "start": 0,
+                        "end": 3,
+                        "loc": {
+                          "start": {
+                            "line": 1,
+                            "column": 0
+                          },
+                          "end": {
+                            "line": 1,
+                            "column": 3
+                          }
+                        },
+                        "object": {
+                          "type": "Identifier",
+                          "start": 0,
+                          "end": 1,
+                          "loc": {
+                            "start": {
+                              "line": 1,
+                              "column": 0
+                            },
+                            "end": {
+                              "line": 1,
+                              "column": 1
+                            },
+                            "identifierName": "x"
+                          },
+                          "name": "x"
+                        },
+                        "property": {
+                          "type": "Identifier",
+                          "start": 2,
+                          "end": 3,
+                          "loc": {
+                            "start": {
+                              "line": 1,
+                              "column": 2
+                            },
+                            "end": {
+                              "line": 1,
+                              "column": 3
+                            },
+                            "identifierName": "y"
+                          },
+                          "name": "y"
+                        },
+                        "computed": false
+                      },
+                      "property": {
+                        "type": "Identifier",
+                        "start": 5,
+                        "end": 6,
+                        "loc": {
+                          "start": {
+                            "line": 1,
+                            "column": 5
+                          },
+                          "end": {
+                            "line": 1,
+                            "column": 6
+                          },
+                          "identifierName": "a"
+                        },
+                        "name": "a"
+                      },
+                      "computed": false
+                    },
+                    "property": {
+                      "type": "Identifier",
+                      "start": 8,
+                      "end": 9,
+                      "loc": {
+                        "start": {
+                          "line": 1,
+                          "column": 8
+                        },
+                        "end": {
+                          "line": 1,
+                          "column": 9
+                        },
+                        "identifierName": "b"
+                      },
+                      "name": "b"
+                    },
+                    "computed": false
+                  },
+                  "property": {
+                    "type": "Identifier",
+                    "start": 10,
+                    "end": 11,
+                    "loc": {
+                      "start": {
+                        "line": 1,
+                        "column": 10
+                      },
+                      "end": {
+                        "line": 1,
+                        "column": 11
+                      },
+                      "identifierName": "c"
+                    },
+                    "name": "c"
+                  },
+                  "computed": false
+                },
+                "property": {
+                  "type": "Identifier",
+                  "start": 12,
+                  "end": 13,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 12
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 13
+                    },
+                    "identifierName": "d"
+                  },
+                  "name": "d"
+                },
+                "computed": true
+              },
+              "arguments": [
+                {
+                  "type": "Identifier",
+                  "start": 15,
+                  "end": 16,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 15
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 16
+                    },
+                    "identifierName": "e"
+                  },
+                  "name": "e"
+                },
+                {
+                  "type": "Identifier",
+                  "start": 18,
+                  "end": 19,
+                  "loc": {
+                    "start": {
+                      "line": 1,
+                      "column": 18
+                    },
+                    "end": {
+                      "line": 1,
+                      "column": 19
+                    },
+                    "identifierName": "f"
+                  },
+                  "name": "f"
+                }
+              ]
+            },
+            "property": {
+              "type": "Identifier",
+              "start": 21,
+              "end": 22,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 21
+                },
+                "end": {
+                  "line": 1,
+                  "column": 22
+                },
+                "identifierName": "g"
+              },
+              "name": "g"
+            },
+            "computed": true
+          },
+          "property": {
+            "type": "Identifier",
+            "start": 25,
+            "end": 26,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 25
+              },
+              "end": {
+                "line": 1,
+                "column": 26
+              },
+              "identifierName": "h"
+            },
+            "name": "h"
+          },
+          "computed": false
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file
diff --git a/test/fixtures/lightscript/safe-member-expression/computed/actual.js b/test/fixtures/lightscript/safe-member-expression/computed/actual.js
new file mode 100644
index 0000000000..ffe21b97a0
--- /dev/null
+++ b/test/fixtures/lightscript/safe-member-expression/computed/actual.js
@@ -0,0 +1 @@
+x?[y + y]
diff --git a/test/fixtures/lightscript/safe-member-expression/computed/expected.json b/test/fixtures/lightscript/safe-member-expression/computed/expected.json
new file mode 100644
index 0000000000..c3870b58b9
--- /dev/null
+++ b/test/fixtures/lightscript/safe-member-expression/computed/expected.json
@@ -0,0 +1,132 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 9,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 1,
+      "column": 9
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 9,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 1,
+        "column": 9
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 9,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 9
+          }
+        },
+        "expression": {
+          "type": "SafeMemberExpression",
+          "start": 0,
+          "end": 9,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 9
+            }
+          },
+          "object": {
+            "type": "Identifier",
+            "start": 0,
+            "end": 1,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 0
+              },
+              "end": {
+                "line": 1,
+                "column": 1
+              },
+              "identifierName": "x"
+            },
+            "name": "x"
+          },
+          "property": {
+            "type": "BinaryExpression",
+            "start": 3,
+            "end": 8,
+            "loc": {
+              "start": {
+                "line": 1,
+                "column": 3
+              },
+              "end": {
+                "line": 1,
+                "column": 8
+              }
+            },
+            "left": {
+              "type": "Identifier",
+              "start": 3,
+              "end": 4,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 3
+                },
+                "end": {
+                  "line": 1,
+                  "column": 4
+                },
+                "identifierName": "y"
+              },
+              "name": "y"
+            },
+            "operator": "+",
+            "right": {
+              "type": "Identifier",
+              "start": 7,
+              "end": 8,
+              "loc": {
+                "start": {
+                  "line": 1,
+                  "column": 7
+                },
+                "end": {
+                  "line": 1,
+                  "column": 8
+                },
+                "identifierName": "y"
+              },
+              "name": "y"
+            }
+          },
+          "computed": true
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file