diff --git a/.github/workflows/auto_merge.yml b/.github/workflows/auto_merge.yml
new file mode 100644
index 00000000..2d8cbce2
--- /dev/null
+++ b/.github/workflows/auto_merge.yml
@@ -0,0 +1,26 @@
+name: auto merge PR
+
+on:
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  auto_merge:
+    runs-on: ubuntu-latest
+    # 自分が作成したPRでのみ有効化する
+    if: ${{ github.actor == 'Seasawher' }}
+    env:
+      PR_URL: ${{github.event.pull_request.html_url}}
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Merge PR
+        run: |
+          gh pr merge --merge --auto "$PR_URL"