diff --git a/.github/config/rubocop_linter_action.yml b/.github/config/rubocop_linter_action.yml
new file mode 100644
index 0000000..ae36bcf
--- /dev/null
+++ b/.github/config/rubocop_linter_action.yml
@@ -0,0 +1,5 @@
+rubocop_fail_level: "fatal"
+
+versions:
+  - rubocop
+  - rubocop-rspec
diff --git a/.github/workflows/rubocop_linter.yml b/.github/workflows/rubocop_linter.yml
new file mode 100644
index 0000000..71363d1
--- /dev/null
+++ b/.github/workflows/rubocop_linter.yml
@@ -0,0 +1,15 @@
+name: RuboCop linter
+
+on: [push, pull_request]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v1
+
+      - name: RuboCop linter
+        uses: andrewmcodes/rubocop-linter-action@v3.3.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/README.md b/README.md
index 01c2de3..7064093 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 [![Build Status](https://github.com/SciRuby/ruby-sparse/workflows/Ruby-Sparse%20test/badge.svg?branch=master)](https://github.com/SciRuby/ruby-sparse/actions?query=workflow%3A%22Ruby-Sparse+test%22)
 
+[![Ruby Style Guide](https://img.shields.io/badge/code_style-rubocop-brightgreen.svg)](https://github.com/rubocop-hq/rubocop)
+
 Ruby Library for Sparse Tensors.
 
 ## Installation
@@ -30,4 +32,4 @@ rake pry
 
 ## LICENSE
 
-This software is distributed under the [BSD 3-Clause License](LICENSE).
\ No newline at end of file
+This software is distributed under the [BSD 3-Clause License](LICENSE).