diff --git a/src/main/java/com/ntlab/irisserver/resources/MembersRest.java b/src/main/java/com/ntlab/irisserver/resources/MembersRest.java
index e56127e..3d88054 100644
--- a/src/main/java/com/ntlab/irisserver/resources/MembersRest.java
+++ b/src/main/java/com/ntlab/irisserver/resources/MembersRest.java
@@ -1,5 +1,6 @@
 package com.ntlab.irisserver.resources;
 
+import com.ntlab.irisserver.entities.RoomJson;
 import com.ntlab.irisserver.models.RoomManager;
 import com.ntlab.irisserver.entities.Room;
 import com.ntlab.irisserver.entities.Member;
@@ -80,10 +81,11 @@
     @POST
     @Path("/{rid}/members")
     @Produces(MediaType.APPLICATION_JSON)
-    public Room postMembers(@PathParam("rid") String rid, @FormParam("nickname") String nickname) {
+    public RoomJson postMembers(@PathParam("rid") String rid, @FormParam("nickname") String nickname) {
         RoomManager rm = RoomManager.getInstance();
         Room room = rm.getRoom(rid);
         List<Member> gm = room.getMembers();
+        RoomJson rj = new RoomJson(room);
 
         //引数で取ってきたnicknameがListに存在しているか確認
         if(room.getMember(nickname)==null && gm.size() < 10 ){
@@ -93,7 +95,7 @@
             throw new WebApplicationException(response.build());
         }
 
-        return room;
+        return rj;
 
     }