diff --git a/backend/src/services/meilisearch/index.js b/backend/src/services/meilisearch/index.js
index f0552a7..3b87913 100644
--- a/backend/src/services/meilisearch/index.js
+++ b/backend/src/services/meilisearch/index.js
@@ -271,7 +271,7 @@ export async function deleteSchedule(meilisearch, scheduleId) {
 }
 
 /**
- * 전체 일정 동기화
+ * 전체 일정 동기화 (DB에 없는 문서는 삭제)
  */
 export async function syncAllSchedules(meilisearch, db) {
   try {
@@ -303,6 +303,26 @@ export async function syncAllSchedules(meilisearch, db) {
     `);
 
     const index = meilisearch.index(INDEX_NAME);
+    const dbIds = new Set(schedules.map(s => s.id));
+
+    // Meilisearch에서 모든 문서 ID 조회
+    let meiliIds = [];
+    let offset = 0;
+    const limit = 1000;
+    while (true) {
+      const docs = await index.getDocuments({ offset, limit, fields: ['id'] });
+      if (docs.results.length === 0) break;
+      meiliIds.push(...docs.results.map(d => d.id));
+      if (docs.results.length < limit) break;
+      offset += limit;
+    }
+
+    // DB에 없는 문서 삭제
+    const idsToDelete = meiliIds.filter(id => !dbIds.has(id));
+    if (idsToDelete.length > 0) {
+      await index.deleteDocuments(idsToDelete);
+      logger.info(`${idsToDelete.length}개 문서 삭제`);
+    }
 
     // 문서 변환 (addDocuments는 같은 ID면 자동 업데이트)
     const documents = schedules.map(s => ({