diff --git a/staging/src/k8s.io/apimachinery/pkg/api/validate/schema.go b/staging/src/k8s.io/apimachinery/pkg/api/validate/schema.go
index 7ae0428631891..7abcfed5afd95 100644
--- a/staging/src/k8s.io/apimachinery/pkg/api/validate/schema.go
+++ b/staging/src/k8s.io/apimachinery/pkg/api/validate/schema.go
@@ -72,3 +72,13 @@ func Optional[T comparable](_ operation.Context, fldPath *field.Path, value, _ *
 	}
 	return field.ErrorList{field.Required(fldPath, "optional value was not specified")}
 }
+
+func MaxItems[T any](_ operation.Context, fldPath *field.Path, value, _ []T, max int) field.ErrorList {
+	if value == nil {
+		return nil
+	}
+	if len(value) > max {
+		return field.ErrorList{field.TooMany(fldPath, len(value), max)}
+	}
+	return nil
+}
diff --git a/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/doc.go b/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/doc.go
new file mode 100644
index 0000000000000..590c7678993ce
--- /dev/null
+++ b/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/doc.go
@@ -0,0 +1,35 @@
+/*
+Copyright 2024 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// +k8s:validation-gen=TypeMeta
+// +k8s:validation-gen-scheme-registry=k8s.io/code-generator/cmd/validation-gen/testscheme.Scheme
+
+// This is a test package.
+package maxitems
+
+import "k8s.io/code-generator/cmd/validation-gen/testscheme"
+
+var localSchemeBuilder = testscheme.New()
+
+// Maxitems
+type M struct {
+	TypeMeta int
+
+	// +k8s:validation:maxItems=3
+	M1 []T `json:"m1"`
+}
+
+type T struct{}
diff --git a/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/doc_test.go b/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/doc_test.go
new file mode 100644
index 0000000000000..43ece1b0596c8
--- /dev/null
+++ b/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/doc_test.go
@@ -0,0 +1,33 @@
+/*
+Copyright 2024 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package maxitems
+
+import (
+	"testing"
+
+	"k8s.io/apimachinery/pkg/util/validation/field"
+)
+
+func Test(t *testing.T) {
+	st := localSchemeBuilder.Test(t)
+
+	st.Value(&M{M1: []T{{}, {}}}).ExpectValid()
+
+	st.Value(&M{M1: []T{{}, {}, {}, {}}}).ExpectInvalid(
+		field.TooMany(field.NewPath("m1"), 4, 3),
+	)
+}
diff --git a/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/zz_generated.validations.go b/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/zz_generated.validations.go
new file mode 100644
index 0000000000000..ec813b9b307b3
--- /dev/null
+++ b/staging/src/k8s.io/code-generator/cmd/validation-gen/output_tests/slices/maxitems/zz_generated.validations.go
@@ -0,0 +1,59 @@
+//go:build !ignore_autogenerated
+// +build !ignore_autogenerated
+
+/*
+Copyright The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by validation-gen. DO NOT EDIT.
+
+package maxitems
+
+import (
+	fmt "fmt"
+
+	operation "k8s.io/apimachinery/pkg/api/operation"
+	safe "k8s.io/apimachinery/pkg/api/safe"
+	validate "k8s.io/apimachinery/pkg/api/validate"
+	field "k8s.io/apimachinery/pkg/util/validation/field"
+	testscheme "k8s.io/code-generator/cmd/validation-gen/testscheme"
+)
+
+func init() { localSchemeBuilder.Register(RegisterValidations) }
+
+// RegisterValidations adds validation functions to the given scheme.
+// Public to allow building arbitrary schemes.
+func RegisterValidations(scheme *testscheme.Scheme) error {
+	scheme.AddValidationFunc((*M)(nil), func(opCtx operation.Context, obj, oldObj interface{}, subresources ...string) field.ErrorList {
+		if len(subresources) == 0 {
+			return Validate_M(opCtx, obj.(*M), safe.Cast[*M](oldObj), nil)
+		}
+		return field.ErrorList{field.InternalError(nil, fmt.Errorf("no validation found for %T, subresources: %v", obj, subresources))}
+	})
+	return nil
+}
+
+func Validate_M(opCtx operation.Context, obj, oldObj *M, fldPath *field.Path) (errs field.ErrorList) {
+	// field M.TypeMeta has no validation
+
+	// field M.M1
+	errs = append(errs,
+		func(obj, oldObj []T, fldPath *field.Path) (errs field.ErrorList) {
+			errs = append(errs, validate.MaxItems(opCtx, fldPath, obj, oldObj, 3)...)
+			return
+		}(obj.M1, safe.Field(oldObj, func(oldObj *M) []T { return oldObj.M1 }), fldPath.Child("m1"))...)
+
+	return errs
+}
diff --git a/staging/src/k8s.io/code-generator/cmd/validation-gen/validators/openapi.go b/staging/src/k8s.io/code-generator/cmd/validation-gen/validators/openapi.go
index d7e5b16fbf08b..4b3627ed2bdc1 100644
--- a/staging/src/k8s.io/code-generator/cmd/validation-gen/validators/openapi.go
+++ b/staging/src/k8s.io/code-generator/cmd/validation-gen/validators/openapi.go
@@ -35,12 +35,14 @@ const (
 	markerPrefix     = "k8s:validation:"
 	formatTagName    = markerPrefix + ":format"
 	maxLengthTagName = markerPrefix + ":maxLength"
+	maxItemsTagName  = markerPrefix + ":maxItems"
 )
 
 var (
 	ipValidator        = types.Name{Package: libValidationPkg, Name: "IP"}
 	dnsLabelValidator  = types.Name{Package: libValidationPkg, Name: "DNSLabel"}
 	maxLengthValidator = types.Name{Package: libValidationPkg, Name: "MaxLength"}
+	maxItemsValidator  = types.Name{Package: libValidationPkg, Name: "MaxItems"}
 )
 
 func (openAPIDeclarativeValidator) ExtractValidations(t *types.Type, comments []string) (Validations, error) {
@@ -53,6 +55,9 @@ func (openAPIDeclarativeValidator) ExtractValidations(t *types.Type, comments []
 	if schema.MaxLength != nil {
 		result.AddFunction(Function(maxLengthTagName, DefaultFlags, maxLengthValidator, *schema.MaxLength))
 	}
+	if schema.MaxItems != nil {
+		result.AddFunction(Function(maxItemsTagName, DefaultFlags, maxItemsValidator, *schema.MaxItems))
+	}
 	if len(schema.Format) > 0 {
 		formatFunction := FormatValidationFunction(schema.Format)
 		if formatFunction != nil {