diff --git a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
index 5f91723..f8c799b 100644
--- a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
+++ b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
@@ -83,7 +83,7 @@
         });
 
         //疑似的な通知のためにchatViewModelを定義する
-        chatViewModel = new ViewModelProvider(this).get(ChatViewModel.class);
+//      chatViewModel = new ViewModelProvider(this).get(ChatViewModel.class);
         //chatViewModel.addNotificationListener(this);
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
             if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.POST_NOTIFICATIONS)
@@ -206,6 +206,7 @@
                     assert friendIconView != null;
 
                     activityViewModel.getActivitiesLiveDataFromUserId(friendUserId).removeObserver(friendIconView.getActivitiesObserver());
+                    chatViewModel.getChatFriendToMeLiveData().removeObserver(friendIconView.getChatObserver());
                 }
 
                 // 1. recentUpdatedFriendsを更新する
@@ -244,6 +245,8 @@
 
                                         // 各FriendIconViewにActivityをobserveさせる
                                         activityViewModel.getActivitiesLiveDataFromUserId(friendId).observe(MainActivity.this, friendIconView.getActivitiesObserver());
+                                        // 各FriendIconViewにChatをobserveさせる
+                                        chatViewModel.getChatFriendToMeLiveData().observe(MainActivity.this,friendIconView.getChatObserver());
                                     }
                                 });
                             }