diff --git a/map4.js b/map4.js
index d44cd5a..c2873da 100644
--- a/map4.js
+++ b/map4.js
@@ -536,13 +536,15 @@
       const isMe = m.user_name === currentUser;
       const side = isMe ? "chat-right" : "chat-left";
 
-      return `
-      <div class="chat-line">
-        <div class="chat-bubble ${side}">
-          ${isMe ? "" : `<strong>${m.user_name}</strong><br>`}
-          ${m.message}
-        </div>
-      </div>`;
+	return `
+	 <div class="chat-line">
+	  <div class="chat-bubble ${side}">
+	 　 ${isMe ? "" : `<strong>${m.user_name}</strong><br>`}
+	 　 ${m.message}
+	 　 <div class="chat-time">${formatTime(m.created_at)}</div>
+　　  </div>
+  </div>`;
+
     })
     .join("");
 
@@ -563,6 +565,13 @@
   input.value = "";
   loadMessages();
 }
+function formatTime(t) {
+  if (!t) return "";
+  const d = new Date(t);
+  const h = String(d.getHours()).padStart(2, "0");
+  const m = String(d.getMinutes()).padStart(2, "0");
+  return `${h}:${m}`;
+}
 
 // ===================================
 // メイン処理