diff --git a/dictation_server/src/common/validators/status.validator.ts b/dictation_server/src/common/validators/status.validator.ts
new file mode 100644
index 0000000..eca361e
--- /dev/null
+++ b/dictation_server/src/common/validators/status.validator.ts
@@ -0,0 +1,43 @@
+import {
+  registerDecorator,
+  ValidationArguments,
+  ValidationOptions,
+  ValidatorConstraint,
+  ValidatorConstraintInterface,
+} from 'class-validator';
+import { TASK_STATUS } from '../../constants';
+
+@ValidatorConstraint()
+export class IsStatusConstraint implements ValidatorConstraintInterface {
+  private readonly STATUS: string[] = Object.values(TASK_STATUS);
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  validate(value: string, args: ValidationArguments): boolean {
+    if (value) {
+      // ,で分割した文字列のすべてがTASK_STATUSのプロパティに存在する値であった場合のみtrue
+      return value.split(',').every((state) => this.STATUS.includes(state));
+    } else {
+      return false;
+    }
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  defaultMessage(validationArguments?: ValidationArguments): string {
+    return `invalid status string`;
+  }
+}
+/**
+ * ,で分割した文字列のすべてがTASK_STATUSのプロパティに存在する値であるかをチェックする
+ * @param [validationOptions]
+ * @returns
+ */
+export function IsStatus(validationOptions?: ValidationOptions) {
+  return (object: object, propertyName: string) => {
+    registerDecorator({
+      name: 'IsStatus',
+      target: object.constructor,
+      propertyName,
+      options: validationOptions,
+      validator: IsStatusConstraint,
+    });
+  };
+}
diff --git a/dictation_server/src/features/tasks/types/types.ts b/dictation_server/src/features/tasks/types/types.ts
index 7fe5ab6..fcaa5b1 100644
--- a/dictation_server/src/features/tasks/types/types.ts
+++ b/dictation_server/src/features/tasks/types/types.ts
@@ -3,6 +3,7 @@ import { AudioOptionItem } from '../../../features/files/types/types';
 import { Type } from 'class-transformer';
 import { IsIn, IsInt, IsOptional, Min } from 'class-validator';
 import { TASK_LIST_SORTABLE_ATTRIBUTES } from '../../../constants';
+import { IsStatus } from '../../../common/validators/status.validator';
 
 export class TasksRequest {
   @ApiProperty({
@@ -37,7 +38,7 @@ export class TasksRequest {
     example: 'Uploaded,Pending,InProgress',
   })
   @IsOptional()
-  // TODO: 入力チェックを行うデコレータを追加する。@Matches or カスタムデコレータで実装想定。statusの値は先頭大文字であることまで一致しなくていいはず？（実装時レビューにて要確認）
+  @IsStatus()
   status?: string;
 
   @ApiProperty({