diff --git a/schema/paths/forms/questions/index.yml b/schema/paths/forms/questions/index.yml
index 74ba3eb..90410a6 100644
--- a/schema/paths/forms/questions/index.yml
+++ b/schema/paths/forms/questions/index.yml
@@ -25,3 +25,26 @@ post:
       $ref: "../../../errors/errorResponses.yml#/components/responses/forbidden"
     "500":
       $ref: "../../../errors/errorResponses.yml#/components/responses/internalServerError"
+
+delete:
+  operationId: deleteQuestion
+  summary: 質問を削除する
+  description: 作成済みの質問を削除する
+  requestBody:
+    description: 削除するフォーム質問ID
+    required: true
+    content:
+      application/json:
+        schema:
+          $ref: "../../../types/forms/definitions.yml#/definitions/question_id"
+  responses:
+    "200":
+      description: "質問の削除に成功"
+    "400":
+      $ref: "../../../errors/errorResponses.yml#/components/responses/syntaxError"
+    "401":
+      $ref: "../../../errors/errorResponses.yml#/components/responses/unauthorized"
+    "404":
+      $ref: "../../../errors/errorResponses.yml#/components/responses/notFound"
+    "500":
+      $ref: "../../../errors/errorResponses.yml#/components/responses/internalServerError"
diff --git a/schema/types/forms/components.yml b/schema/types/forms/components.yml
index b9ee56b..fe6c926 100644
--- a/schema/types/forms/components.yml
+++ b/schema/types/forms/components.yml
@@ -63,7 +63,6 @@ components:
       description: 質問のID
       type: integer
       minimum: 0
-      readOnly: true
       example: 0
     question_title:
       description: 質問のタイトル
@@ -99,7 +98,9 @@ components:
       type: object
       properties:
         question_id:
-          $ref: "#/components/schemas/question_id"
+          readOnly: true
+          allOf:
+            - $ref: "#/components/schemas/question_id"
         question_title:
           $ref: "#/components/schemas/question_title"
         question_description:
diff --git a/schema/types/forms/definitions.yml b/schema/types/forms/definitions.yml
index 5e648cb..996c6a7 100644
--- a/schema/types/forms/definitions.yml
+++ b/schema/types/forms/definitions.yml
@@ -32,6 +32,12 @@ definitions:
     properties:
       questions:
         $ref: "./components.yml#/components/schemas/questions"
+  question_id:
+    description: 質問のID
+    type: object
+    properties:
+      question_id:
+        $ref: "./components.yml#/components/schemas/question_id"
   id:
     type: object
     properties: