diff --git a/agent-office/app/scheduler.py b/agent-office/app/scheduler.py
index deb1b6e..02a0ddf 100644
--- a/agent-office/app/scheduler.py
+++ b/agent-office/app/scheduler.py
@@ -1,7 +1,9 @@
 import asyncio
+import logging
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
 
 from .agents import AGENT_REGISTRY
+from .db import delete_old_logs
 
 scheduler = AsyncIOScheduler(timezone="Asia/Seoul")
 
@@ -81,6 +83,11 @@ async def _poll_pipelines():
     if agent:
         await agent.poll_state_changes()
 
+def _cleanup_old_logs():
+    n = delete_old_logs(days=90)
+    if n:
+        logging.getLogger(__name__).info("delete_old_logs: %d rows removed", n)
+
 def init_scheduler():
     scheduler.add_job(_run_stock_schedule, "cron", hour=7, minute=30, id="stock_news")
     scheduler.add_job(
@@ -117,4 +124,5 @@ def init_scheduler():
     scheduler.add_job(_run_youtube_research,     "cron", hour=9, minute=10, id="youtube_research")
     scheduler.add_job(_send_youtube_weekly_report, "cron", day_of_week="mon", hour=8, minute=0, id="youtube_weekly_report")
     scheduler.add_job(_poll_pipelines, "interval", seconds=30, id="pipeline_poll")
+    scheduler.add_job(_cleanup_old_logs, "cron", hour=3, minute=0, id="cleanup_old_logs", replace_existing=True)
     scheduler.start()