diff --git a/app/src/main/java/com/example/tampopo_client/viewmodels/ChatViewModel.java b/app/src/main/java/com/example/tampopo_client/viewmodels/ChatViewModel.java
index dd58bf9..427a9db 100644
--- a/app/src/main/java/com/example/tampopo_client/viewmodels/ChatViewModel.java
+++ b/app/src/main/java/com/example/tampopo_client/viewmodels/ChatViewModel.java
@@ -165,10 +165,10 @@
     // 2. メッセージ送信
     // ===============================
     public void sendMessage(String chatroomId, String senderId, String message, String token) {
-        Call<Void> call = chatroomResource.sendMessage(chatroomId, senderId, message, token);
-        call.enqueue(new Callback<Void>() {
+        Call<Chatroom> call = chatroomResource.sendMessage(chatroomId, senderId, message, token);
+        call.enqueue(new Callback<Chatroom>() {
             @Override
-            public void onResponse(Call<Void> call, Response<Void> response) {
+            public void onResponse(Call<Chatroom> call, Response<Chatroom> response) {
                 if (response.isSuccessful()) {
                     // メッセージ送信成功後、すぐに最新メッセージを読み込む
                     loadLatestMessage(chatroomId, userId, token);
@@ -177,7 +177,7 @@
 
 
             @Override
-            public void onFailure(Call<Void> call, Throwable t) {
+            public void onFailure(Call<Chatroom> call, Throwable t) {
                 Log.e("ChatVM", "sendMessage error: " + t.getMessage());
             }
         });