diff --git a/src/main/java/com/example/cosmos_serversb/jsons/UserJsonForRequests.java b/src/main/java/com/example/cosmos_serversb/jsons/UserJsonForRequests.java
index e011e46..11285ca 100644
--- a/src/main/java/com/example/cosmos_serversb/jsons/UserJsonForRequests.java
+++ b/src/main/java/com/example/cosmos_serversb/jsons/UserJsonForRequests.java
@@ -17,7 +17,6 @@
         setUri(user.getUri());
         setName(user.getName());
         setIconUri(user.getIconUri());
-
     }
 
     public String getuId() {
diff --git a/src/main/java/com/example/cosmos_serversb/models/Groups.java b/src/main/java/com/example/cosmos_serversb/models/Groups.java
index 28f67bf..9e8965f 100644
--- a/src/main/java/com/example/cosmos_serversb/models/Groups.java
+++ b/src/main/java/com/example/cosmos_serversb/models/Groups.java
@@ -83,14 +83,14 @@
         return null;
     }
 
-    public static UsersMapJson addMember(String gId, String uId){
+    public static Group addMember(String gId, String uId){
         Session session = SessionManager.getInstance().getSession();
-        Group editGroup = session.load(Group.class, gId);
+        Group editGroup = session.get(Group.class, gId);
         if(editGroup != null) {
             editGroup.addMember(uId);
             session.update(editGroup);
-            UsersMapJson usersMapJson = new UsersMapJson(editGroup);
-            return usersMapJson;
+            //UsersMapJson usersMapJson = new UsersMapJson(editGroup);
+            return editGroup;
         }else{
             //例外処理
             return null;
diff --git a/src/main/java/com/example/cosmos_serversb/resources/GroupsRest.java b/src/main/java/com/example/cosmos_serversb/resources/GroupsRest.java
index bd30720..b2c1024 100644
--- a/src/main/java/com/example/cosmos_serversb/resources/GroupsRest.java
+++ b/src/main/java/com/example/cosmos_serversb/resources/GroupsRest.java
@@ -86,7 +86,8 @@
     public String addMember(@PathParam("gId") String gId, @FormParam("uId") String uId, @FormParam("token") String token) throws JsonProcessingException{
         SessionManager.getInstance().getSession();
         ObjectMapper mapper = new ObjectMapper();
-        String json = mapper.writeValueAsString(Groups.getInstance().addMember(gId, uId));
+        Group editGroup = Groups.getInstance().addMember(gId, uId);
+        String json = mapper.writeValueAsString(new GroupJson(editGroup));
         SessionManager.getInstance().closeSession();
         return json;
     }