diff --git a/.github/actions/generate-swagger/action.yml b/.github/actions/generate-swagger/action.yml
new file mode 100644
index 0000000000..36062105fb
--- /dev/null
+++ b/.github/actions/generate-swagger/action.yml
@@ -0,0 +1,9 @@
+name: generate swagger
+description: generate swagger files based on protobuf
+runs:
+  using: "composite"
+  steps:
+    - run: make proto-swagger-gen
+      shell: sh
+    - run: make update-swagger-docs
+      shell: sh
diff --git a/.github/workflows/proto.yml b/.github/workflows/proto.yml
index 832fa81d63..4bc042d66c 100644
--- a/.github/workflows/proto.yml
+++ b/.github/workflows/proto.yml
@@ -19,6 +19,17 @@ jobs:
           extensions: 'proto'
           clangFormatVersion: 12
           inplace: True
+  swagger:
+    name: check generated swagger files
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2.2.0
+        with:
+          go-version: 1.15
+      - uses: ./.github/actions/generate-swagger
+      - run: git diff-index --quiet HEAD
+
 # TODO ebony: release comment after merging initial proto files to v2 branch
 #  breakage:
 #    runs-on: ubuntu-latest
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36471f28e9..e5486ee562 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -47,4 +47,6 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Build, CI
 
+* (ci) [\#457](https://github.com/line/lbm-sdk/pull/457) add swagger check
+
 ### Document Updates