diff --git a/app/src/main/java/com/example/tampopo_client/views/ChatActivity.java b/app/src/main/java/com/example/tampopo_client/views/ChatActivity.java
index 890aaf2..2311cd0 100644
--- a/app/src/main/java/com/example/tampopo_client/views/ChatActivity.java
+++ b/app/src/main/java/com/example/tampopo_client/views/ChatActivity.java
@@ -8,6 +8,8 @@
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.ImageButton;
+import android.widget.TextView;
+
 import androidx.activity.EdgeToEdge;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.graphics.Insets;
@@ -27,6 +29,7 @@
   private EditText receiverMessage;
   private Button sendButton;
   private ImageButton backButton;
+  private EditText roomId;
 
   Tampopo tampopo;
 
@@ -46,7 +49,7 @@
     receiverMessage = findViewById(R.id.receiver_message);
     sendButton = findViewById(R.id.send_Button);
     backButton = findViewById(R.id.back_Button);
-
+    roomId = findViewById(R.id.chat_room_id);
     receiverMessage.setKeyListener(null);//受信メッセージ編集不可
 
 //    buttonSend.setOnClickListener(new OnClickListener() {
@@ -72,6 +75,7 @@
     //String myId = tampopo.getUserId();
     //String friendId = tampopo.getChatFriendId();
     String chatroomId = tampopo.getChatroomId();
+    roomId.setText(chatroomId);
     //String chatroomId = "0";
     //String token = tampopo.getToken();