diff --git a/nanoclaude/routers/synology.py b/nanoclaude/routers/synology.py
index 2c347f0..7dd8610 100644
--- a/nanoclaude/routers/synology.py
+++ b/nanoclaude/routers/synology.py
@@ -69,7 +69,7 @@ async def synology_webhook(request: Request):
     logger.info("Synology job %s from %s: %s", job.id, username, text[:50])
 
     # "처리 중" 메시지 먼저 전송 (typing 느낌)
-    await send_to_synology("🤔 생각 중...")
+    await send_to_synology("🤔 생각 중...", raw=True)
 
     # 파이프라인 시작 (비동기)
     await jq_module.job_queue.submit(job)
diff --git a/nanoclaude/services/synology_sender.py b/nanoclaude/services/synology_sender.py
index 88195a5..d74472b 100644
--- a/nanoclaude/services/synology_sender.py
+++ b/nanoclaude/services/synology_sender.py
@@ -4,6 +4,7 @@ from __future__ import annotations
 
 import json
 import logging
+import re
 
 import httpx
 
@@ -12,12 +13,24 @@ from config import settings
 logger = logging.getLogger(__name__)
 
 
-async def send_to_synology(text: str) -> bool:
-    """Incoming webhook URL로 메시지 전송. 성공 시 True."""
+def _strip_markdown(text: str) -> str:
+    """마크다운 문법 제거 — Synology Chat은 렌더링 안 됨."""
+    text = re.sub(r'\*\*(.+?)\*\*', r'\1', text)  # **bold**
+    text = re.sub(r'\*(.+?)\*', r'\1', text)       # *italic*
+    text = re.sub(r'`(.+?)`', r'\1', text)         # `code`
+    text = re.sub(r'^#{1,6}\s+', '', text, flags=re.MULTILINE)  # ### headers
+    text = re.sub(r'^\s*[-*]\s+', '• ', text, flags=re.MULTILINE)  # - list → •
+    return text
+
+
+async def send_to_synology(text: str, *, raw: bool = False) -> bool:
+    """Incoming webhook URL로 메시지 전송. raw=True면 마크다운 제거 안 함."""
     if not settings.synology_incoming_url:
         logger.warning("Synology incoming URL not configured")
         return False
 
+    if not raw:
+        text = _strip_markdown(text)
     payload = json.dumps({"text": text}, ensure_ascii=False)
 
     try:
diff --git a/nanoclaude/services/worker.py b/nanoclaude/services/worker.py
index dbad67f..a764abe 100644
--- a/nanoclaude/services/worker.py
+++ b/nanoclaude/services/worker.py
@@ -163,7 +163,7 @@ async def run(job: Job) -> None:
             if job.callback != "synology":
                 await state_stream.push(job.id, "rewrite", {"content": rewritten_message})
             else:
-                await send_to_synology("📝 더 깊이 살펴볼게요...")
+                await send_to_synology("📝 더 깊이 살펴볼게요...", raw=True)
 
             if job.status == JobStatus.cancelled:
                 return
@@ -241,7 +241,7 @@ async def run(job: Job) -> None:
         await state_stream.push(job.id, "error", {"message": "내부 오류가 발생했습니다."})
         if job.callback == "synology":
             try:
-                await send_to_synology("⚠️ 처리 중 오류가 발생했습니다. 다시 시도해주세요.")
+                await send_to_synology("⚠️ 처리 중 오류가 발생했습니다. 다시 시도해주세요.", raw=True)
             except Exception:
                 pass
         try: