diff --git a/README.md b/README.md
index 597ed01..22f8817 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,3 @@
 CosmosAPIGroup
 ===============
+これはCosmosのgroupAPIです。
\ No newline at end of file
diff --git a/groupAPI.yaml b/groupAPI.yaml
index 8e89b70..5da21f2 100644
--- a/groupAPI.yaml
+++ b/groupAPI.yaml
@@ -1,23 +1,45 @@
 swagger: "2.0"
 info:
-  description: "This is "
+  description: "これはCosmosのgroupAPIです"
   version: "1.0.0"
-  title: "Petstore API"
+  title: "Group API"
   termsOfService: "http://swagger.io/terms/"
   contact:
-    email: "apiteam@swagger.io"
+    email: "s1671045@s.konan-u.ac.jp"
   license:
     name: "Apache 2.0"
     url: "http://www.apache.org/licenses/LICENSE-2.0.html"
 paths:
-  /pet/{petId}:
-    get:
-      summary: "ペット情報API"
-      description: "指定されたpetIdの情報を返します"
+  /cosmos/groups:
+    post:
+      summary: "グループ作成"
+      description: "新規グループを作成"
+      consumes: 
+      - "multipart/form-data"
       parameters:
-      - name: "petId"
+      - name: "name"
+        in: "formData"
+        description: "新規グループの名前"
+        required: true
+        type: "string"
+      - name: "uId"
+        in: "formData"
+        description: "新規グループ作成者のuId"
+        required: true
+        type: "string"
+      responses:
+        200:
+          description: "成功時のレスポンス"
+          schema:
+            $ref: "#/definitions/newGroupInfo"
+  /cosmos/groups/{groupId}:
+    get:
+      summary: "グループ情報API"
+      description: "指定されたグループの情報を返します"
+      parameters:
+      - name: "groupId"
         in: "path"
-        description: "取得したいペットのID"
+        description: "取得したいグループのID"
         required: true
         type: "integer"
         format: "int64"
@@ -25,11 +47,117 @@
         200:
           description: "成功時のレスポンス"
           schema:
-            type: "object"
-            properties:
-              id:
-                type: "integer"
-                format: "int64"
-              name:
-                type: "string"
-                example: "doggie"
\ No newline at end of file
+            $ref: "#/definitions/groupInfo"
+        404:
+          description: "失敗時のレスポンス"
+          schema:
+            $ref: "#/definitions/error"
+    delete:
+      summary: "delete a group"
+      description: "指定されたグループを削除"
+      parameters:
+      - name: "groupId"
+        in: "path"
+        description: "削除したいグループのID"
+        required: true
+        type: "integer"
+        format: "int64"
+      responses:
+        200:
+          description: "成功時のレスポンス"
+          schema:
+            $ref: "#/definitions/delete"
+  /cosmos/groups/{groupId}/members:
+    get:
+      summary: "メンバー情報"
+      description: "指定されたグループのメンバーの情報"
+      parameters:
+      - name: "groupId"
+        in: "path"
+        description: "取得したいグループのID"
+        required: true
+        type: "integer"
+        format: "int64"
+      responses:
+        200:
+          description: "成功時のレスポンス"
+          schema:
+            $ref: "#/definitions/membersInfo"
+    post:
+      summary: "グループにメンバー追加"
+      description: "指定したグループにメンバーを追加"
+      consumes: 
+      - "multipart/form-data"
+      parameters:
+      - name: "groupId"
+        in: "path"
+        description: "取得したいグループのID"
+        required: true
+        type: "integer"
+        format: "int64"
+      - name: "uId"
+        in: "formData"
+        description: "追加したいメンバーのuId"
+        required: true
+        type: "integer"
+        format: "int64"
+      responses:
+        200:
+          description: "成功時のレスポンス"
+          schema:
+            $ref: "#/definitions/membersInfo"
+definitions:
+  groupInfo:
+    type: "object"
+    properties:
+      gId:
+        type: "integer"
+        format: "int64"
+      uri:
+        type: "string"
+        example: "http://sample.com"
+      name:
+        type: "string"
+        example: "family"
+      members:
+        type: "object"
+        example: [{"uId":"123456789","uri":"http://123456789.com"},{"uId":"987654321","uri":"http://987654321.com"}]
+      requests:
+        type: "object"
+        example: [{"rId":"123456789","uri":"http://123456789.com"},{"rId":"987654321","uri":"http://987654321.com"}]
+  membersInfo:
+    type: "object"
+    properties:
+      members:
+        type: "object"
+        example: [{"uId":"123456789","uri":"http://123456789.com"},{"uId":"987654321","uri":"http://987654321.com"}]
+  newGroupInfo:
+    type: "object"
+    properties:
+      gId:
+        type: "integer"
+        format: "int64"
+      uri:
+        type: "string"
+        example: "http://sample.com"
+      name:
+        type: "string"
+        example: "family"
+      members:
+        type: "object"
+        example: [{"uId":"123456789","uri":"http://123456789.com"}]
+      requests:
+        type: "object"
+        example: []
+  delete:
+    type: "object"
+    properties:
+      massage:
+        type: "string"
+        example: "Already Deleted"
+  error:
+    type: "object"
+    properties:
+      massage:
+        type: "string"
+        example: "Not Found"