diff --git a/decode_test.go b/decode_test.go
index 4d2c999b..50d633f7 100644
--- a/decode_test.go
+++ b/decode_test.go
@@ -939,6 +939,18 @@ c: d
 				"c": "d",
 			},
 		},
+		{
+			`---
+a:
+b:
+c:
+`,
+			map[string]interface{}{
+				"a": nil,
+				"b": nil,
+				"c": nil,
+			},
+		},
 
 		// Multi bytes
 		{
diff --git a/parser/parser.go b/parser/parser.go
index 56d7b9bc..78d9fa3a 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -113,8 +113,21 @@ func (p *parser) parseMapValue(ctx *context, key ast.Node, colonToken *token.Tok
 		return ast.Null(nullToken), nil
 	}
 
+	if tk.Position.Column == key.GetToken().Position.Column && tk.Type == token.StringType {
+		// in this case,
+		// ----
+		// key: <value does not defined>
+		// next
+		nullToken := p.createNullToken(colonToken)
+		ctx.insertToken(ctx.idx, nullToken)
+		return ast.Null(nullToken), nil
+	}
+
 	if tk.Position.Column < key.GetToken().Position.Column {
-		// in this case, key: <value does not defined>
+		// in this case,
+		// ----
+		//   key: <value does not defined>
+		// next
 		nullToken := p.createNullToken(colonToken)
 		ctx.insertToken(ctx.idx, nullToken)
 		return ast.Null(nullToken), nil
diff --git a/parser/parser_test.go b/parser/parser_test.go
index a6e7546e..c41766e2 100644
--- a/parser/parser_test.go
+++ b/parser/parser_test.go
@@ -183,7 +183,7 @@ a: 0 - 1
 - a:
    b: c
    d: e
-- f:
+- f: null
   g: h
 `,
 		},
@@ -223,7 +223,7 @@ a:
 -     a     :
       b: c
 `, `
-- a:
+- a: null
   b: c
 `,
 		},