diff --git a/example.json b/example.json
index 0876118..a25b06b 100644
--- a/example.json
+++ b/example.json
@@ -11,11 +11,7 @@
   },
   "environment": {
     "luck_today": 0.9,
-    "luck_history": [
-      0.9,
-      0.9,
-      0.9
-    ],
+    "luck_history": [0.9, 0.9, 0.9],
     "level": 1
   },
   "messaging": {
@@ -25,7 +21,9 @@
     "templates": [
       "おはよう！今日もがんばろう！",
       "ねえ、話したいことがあるの。"
-    ]
+    ],
+    "sent_today": false,
+    "last_sent_date": null
   },
   "last_interaction": "2025-05-21T23:15:00Z",
   "memory": {
diff --git a/src/commands/scheduler.rs b/src/commands/scheduler.rs
index 78cccaa..8028dee 100644
--- a/src/commands/scheduler.rs
+++ b/src/commands/scheduler.rs
@@ -19,6 +19,21 @@ fn send_scheduled_message() {
         return;
     }
 
+    // 日付の比較（1日1回制限）
+    let today = Local::now().format("%Y-%m-%d").to_string();
+    if let Some(last_date) = &user.messaging.last_sent_date {
+        if last_date != &today {
+            user.messaging.sent_today = false;
+        }
+    } else {
+        user.messaging.sent_today = false;
+    }
+
+    if user.messaging.sent_today {
+        println!("🔁 本日はすでに送信済みです: {}", today);
+        return;
+    }
+
     if let Some(schedule_str) = &user.messaging.schedule_time {
         let now = Local::now();
         let target: Vec<&str> = schedule_str.split(':').collect();
@@ -36,12 +51,19 @@ fn send_scheduled_message() {
                     let dummy_context = Context::new(vec![], None, "".to_string());
                     ask_chat(&dummy_context, msg);
                     user.metrics.intimacy += 0.03;
+
+                    // 送信済みのフラグ更新
+                    user.messaging.sent_today = true;
+                    user.messaging.last_sent_date = Some(today);
+
                     save_user_data(&user_path, &user);
                 }
             }
         }
     }
 }
+
+
 pub fn scheduler_cmd() -> Command {
     Command::new("scheduler")
         .usage("scheduler [interval_sec]")
@@ -96,7 +118,7 @@ pub fn scheduler_cmd() -> Command {
                         user.metrics.energy
                     );
                 }
-
+                
                 save_user_data(&user_path, &user);
                 thread::sleep(Duration::from_secs(interval));
             }
diff --git a/src/metrics.rs b/src/metrics.rs
index 54c743b..0ef592c 100644
--- a/src/metrics.rs
+++ b/src/metrics.rs
@@ -42,6 +42,8 @@ pub struct Messaging {
     pub schedule_time: Option<String>,
     pub decay_rate: f32,
     pub templates: Vec<String>,
+    pub sent_today: bool, // 追加
+    pub last_sent_date: Option<String>, // 追加
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -103,6 +105,8 @@ pub fn load_user_data(path: &Path) -> UserData {
                     "おはよう！今日もがんばろう！".to_string(),
                     "ねえ、話したいことがあるの。".to_string(),
                 ],
+                sent_today: false,
+                last_sent_date: None,
             },
             last_interaction: Utc::now(),
             memory: Memory {