diff --git a/.github/workflows/merge-schedule.yml b/.github/workflows/merge-schedule.yml
deleted file mode 100644
index 1c6ebef..0000000
--- a/.github/workflows/merge-schedule.yml
+++ /dev/null
@@ -1,20 +0,0 @@
-name: merge-schedule
-on:
-  pull_request:
-    types:
-      - opened
-      - edited
-      - synchronize
-  schedule:
-    # https://crontab.guru/every-hour
-    - cron: 0 * * * *
-jobs:
-  merge_schedule:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: gr2m/merge-schedule-action@v2
-        with:
-          time_zone: Asia/Tokyo
-          require_statuses_success: "true"
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}