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 494c624..391bb74 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
@@ -2,6 +2,10 @@
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.Handler;
+import android.os.Looper;
+import android.text.Editable;
+import android.text.TextWatcher;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
@@ -34,6 +38,9 @@
 
   Tampopo tampopo;
 
+  private final Handler handler = new Handler(Looper.getMainLooper());
+  private Runnable runnable;
+
 
 
   @Override
@@ -57,66 +64,38 @@
     friendIdTextView.setText(tampopo.getChatFriendId());
     receiverMessage.setKeyListener(null);//受信メッセージ編集不可
 
-//    buttonSend.setOnClickListener(new OnClickListener() {
-//      @Override
-//      public void onClick(View view) {
-//        String receiverText = receiverMessage.getText().toString();//receiverMessageにユーザーが入力した文字を取り出して、String型の 変数receiverText に入れる
-//        if (!receiverText.isEmpty()) {
-//          String senderId = tampopo.getUserId();
-//          String token = tampopo.getToken();
-//          ChatroomViewModel.loadLatestMessage(null, senderId, token);
-//          receiverMessage.setText(receiverText);//受信欄に表示
-//          senderMessage.setText("");//送信欄をクリア
-//        }
-//      }
-//    });
+    // メッセージ入力時にリアルタイムで送信 (300msディレイ)
+    senderMessage.addTextChangedListener(new TextWatcher() {
+        @Override
+        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
+        }
 
-//    Intent intent = getIntent();
-//    String friendId = intent.getStringExtra("friendId");
-//    String chatroomId = intent.getStringExtra("chatroomId");
+        @Override
+        public void onTextChanged(CharSequence s, int start, int before, int count) {
+            handler.removeCallbacks(runnable);
+        }
 
-
-
-    //String myId = tampopo.getUserId();
-    //String friendId = tampopo.getChatFriendId();
-    String chatroomId = tampopo.getChatroomId();
-    roomId.setText(chatroomId);
-    //String chatroomId = "0";
-    //String token = tampopo.getToken();
-
-    // chatroomViewModel.enterChatroom(myId, friendId, token);
-
-    //Log.d("ChatDebug", "チャット相手ID: " + friendId);
-    Log.d("ChatDebug", "チャットルームID: " + chatroomId);
-
-
-//    chatroomViewModel.getChatroomIdLiveData().observe(this, id -> {
-//      if (id != null) {
-//        tampopo.setChatroomId(id);
-//        System.out.println("チャットルーム作成完了！ ID: " + id);
-//      } else {
-//        System.out.println("チャットルーム作成に失敗しました");
-//      }
-//    });
-
-
-    //メッセージ送信
-    sendButton.setOnClickListener(new OnClickListener() { //sendButtonがクリックされたときの処理
-      @Override
-      public void onClick(View view) { //ボタンがクリックされたときに実行される処理本体
-        String senderText = senderMessage.getText().toString(); //senderMessageにユーザーが入力した文字を取り出して、String型の 変数receiverText に入れる
-        Log.d("ChatDebug", senderText);
-          if (!senderText.isEmpty()) { //senderTextが空でなければ
-            String senderId = tampopo.getUserId();
-            String token = tampopo.getToken();
-            String chatroomId = tampopo.getChatroomId();
-            //String chatroomId = "0";
-            chatViewModel.sendMessage(chatroomId, senderId, senderText, token);
-            senderMessage.setText("");//自分のメッセージを消す
-          }
-      }
+        @Override
+        public void afterTextChanged(Editable s) {
+            runnable = () -> {
+                String senderId = tampopo.getUserId();
+                String token = tampopo.getToken();
+                String chatroomId = tampopo.getChatroomId();
+                if (chatroomId != null) {
+                    chatViewModel.sendMessage(chatroomId, senderId, s.toString(), token);
+                }
+            };
+            handler.postDelayed(runnable, 300); // 300ms delay
+        }
     });
 
+    // 送信ボタンはリアルタイム送信に不要なため、機能を無効化
+    sendButton.setOnClickListener(null);
+
+    String chatroomId = tampopo.getChatroomId();
+    roomId.setText(chatroomId);
+
+    Log.d("ChatDebug", "チャットルームID: " + chatroomId);
 
     //メッセージ受信
     chatViewModel.getLatestMessageLiveData().observe(this, chatMessage -> {