diff --git a/dislocker.py b/dislocker.py
index fba9635..b691495 100644
--- a/dislocker.py
+++ b/dislocker.py
@@ -212,17 +212,22 @@ class Bot(discord.Client):
             cursor = dislocker.db.cursor()
             cursor.execute("SELECT * FROM club_member WHERE discord_userid = %s", (discord_user_id,))
             user_record = cursor.fetchall()
-            cursor.execute("SELECT * FROM pc_usage_history WHERE member_id= %s ORDER BY id DESC LIMIT 1", (user_record[0][0],))
-            pc_usage_history_record = cursor.fetchall()
-            if pc_usage_history_record:
-                if not pc_usage_history_record[0][5] == None:
-                    result = {"result": "unused"}
+            if user_record:
+                cursor.execute("SELECT * FROM pc_usage_history WHERE member_id= %s ORDER BY id DESC LIMIT 1", (user_record[0][0],))
+                pc_usage_history_record = cursor.fetchall()
+                if pc_usage_history_record:
+                    if not pc_usage_history_record[0][5] == None:
+                        result = {"result": "unused"}
+                    else:
+                        cursor.execute("UPDATE pc_usage_history SET end_use_time = current_timestamp WHERE id = %s", (pc_usage_history_record[0][0],))
+                        cursor.execute("UPDATE pc_list SET using_user_id = NULL WHERE pc_number = %s", (pc_usage_history_record[0][2],))
+                        cursor.execute("UPDATE pc_list SET password_hash = NULL WHERE pc_number = %s", (pc_usage_history_record[0][2],))
+                        dislocker.db.commit()
+                        result = {"result": "ok", "pc_number": str(pc_usage_history_record[0][2]), "name": str(user_record[0][1])}
                 else:
-                    cursor.execute("UPDATE pc_usage_history SET end_use_time = current_timestamp WHERE id = %s", (pc_usage_history_record[0][0],))
-                    cursor.execute("UPDATE pc_list SET using_user_id = NULL WHERE pc_number = %s", (pc_usage_history_record[0][2],))
-                    cursor.execute("UPDATE pc_list SET password_hash = NULL WHERE pc_number = %s", (pc_usage_history_record[0][2],))
-                    dislocker.db.commit()
-                    result = {"result": "ok", "pc_number": str(pc_usage_history_record[0][2]), "name": str(user_record[0][1])}
+                    result = {"result": "unused"}
+            else:
+                result = {"result": "user_data_not_found"}
         except:
             print("停止処理にエラーが発生しました。")
             result = {"result": "error"}
@@ -615,6 +620,8 @@ class Bot(discord.Client):
             stop_view = View(timeout=15)
             if pc_stop["result"] == "unused":
                 await interaction.response.send_message("# :shaking_face: 使用されていないようです...", ephemeral=True)
+            elif pc_stop["result"] == "user_data_not_found":
+                await interaction.response.send_message("# :dizzy_face: ユーザーとして登録されていないようです。\n最初にサーバーで登録を行ってください。", ephemeral=True)
             elif pc_stop["result"] == "ok":
                 await interaction.response.send_message(f":white_check_mark: PC番号 {pc_stop["pc_number"]} の使用が終了されました。", ephemeral=True)
                 await self.get_channel(dislocker.server_config["bot"]["log_channel_id"]).send(f':negative_squared_cross_mark: {pc_stop["name"]} さんがPC {pc_stop["pc_number"]} の使用を終了しました。')
@@ -632,17 +639,15 @@ class Bot(discord.Client):
                 await interaction.response.send_message("# :no_entry: 登録できませんでした。\n内部エラーが発生しています。", ephemeral=True)
 
 class Monitor():
-    def __init__(self) -> None:
-        pass
-
-    def start(self, **kwargs):
+    def __init__(self, **kwargs) -> None:
         self.serach_time = kwargs["search_time"]
         self.allowable_time = kwargs["allowable_time"]
+
+    def start(self, **kwargs):
         serach_thread = threading.Thread(target=self.search)
         serach_thread.start()
-        
-            
-    
+
+
     def search(self):
         try:
             while True:
@@ -708,6 +713,7 @@ class Monitor():
                 print(result["result"])
                 time.sleep(self.serach_time)
 
+
         except Exception as error:
             print("自動停止処理中にエラーが発生しました。\nエラー内容")
             print(str(error.__class__.__name__))
@@ -760,8 +766,8 @@ if dislocker.init_result == "ok":
     intents = discord.Intents.default()
     intents.message_content = True
     bot = Bot(intents=intents)
-    monitor = Monitor()
-    monitor.start(search_time=10, allowable_time=300)
+    monitor = Monitor(search_time=1, allowable_time=300)
+    monitor.start()
     bot.run(dislocker.server_config['bot']['token'])
 else:
     pass
\ No newline at end of file