diff --git a/backend/db/dbsetup.py b/backend/db/dbsetup.py
index 0007e9a..c209703 100644
--- a/backend/db/dbsetup.py
+++ b/backend/db/dbsetup.py
@@ -193,11 +193,20 @@ class DatabaseManager:
         Returns:
             sqlite3.Connection: SQLite 연결 객체
         """
-        # 연결이 닫혀있으면 재생성
+        # 연결 유효성 체크 강화
         if self.sqlite_conn is not None:
             try:
-                self.sqlite_conn.execute("SELECT 1")
-            except Exception:
+                # 연결 상태 확인
+                cursor = self.sqlite_conn.cursor()
+                cursor.execute("SELECT 1")
+                cursor.fetchone()
+                cursor.close()
+            except Exception as e:
+                print(f"[DB Manager] SQLite 연결 체크 실패, 재연결: {e}")
+                try:
+                    self.sqlite_conn.close()
+                except:
+                    pass
                 self.sqlite_conn = None
 
         if self.sqlite_conn is None: