diff --git a/.github/workflows/verify-on-container.yml b/.github/workflows/verify-on-container.yml
new file mode 100644
index 0000000..9765d00
--- /dev/null
+++ b/.github/workflows/verify-on-container.yml
@@ -0,0 +1,28 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+
+name: Docker container on Ubuntu 20.04
+
+on:
+- push
+
+jobs:
+  ssh:
+    name: Connect to github.com
+    runs-on: ubuntu-20.04
+    container: ubuntu:20.04
+    steps:
+    - name: Install packages
+      run: |
+        apt update
+        apt -y install openssh-client git
+    - name: Checkout source codes
+      uses: actions/checkout@v2
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY }}
+        known_hosts: ${{ secrets.KNOWN_HOSTS }}
+    - name: print created files
+      run: ls -l /root/.ssh
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5389ad2..b65bb09 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### Added
+
+* Support Docker container (thanks [@kujaomega](https://github.com/kujaomega))
+
 ### Changed
 
 * Bundle dependencies (thanks [@tats-u](https://github.com/tats-u))
diff --git a/README.md b/README.md
index 18bbd87..818d3b0 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@
 [![Ubuntu 20.04][image-verify-ubuntu-2004]][link-verify-ubuntu-2004]
 [![Ubuntu 18.04][image-verify-ubuntu-1804]][link-verify-ubuntu-1804]
 [![Ubuntu 16.04][image-verify-ubuntu-1604]][link-verify-ubuntu-1604]
+[![Docker container][image-verify-docker-container]][link-verify-docker-container]
 [![Release][image-release]][link-release]
 [![License][image-license]][link-license]
 [![Stars][image-stars]][link-stars]
@@ -144,6 +145,8 @@ See [CHANGELOG.md](CHANGELOG.md).
 [link-verify-ubuntu-1804]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Ubuntu+18.04%22
 [image-verify-ubuntu-1604]: https://github.com/shimataro/ssh-key-action/workflows/Ubuntu%2016.04/badge.svg?event=push&branch=v2
 [link-verify-ubuntu-1604]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Ubuntu+16.04%22
+[image-verify-docker-container]: https://github.com/shimataro/ssh-key-action/workflows/Docker%20container%20on%20Ubuntu%2020.04/badge.svg?event=push&branch=v2
+[link-verify-docker-container]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Docker+container+on+Ubuntu+20.04%22
 [image-release]: https://img.shields.io/github/release/shimataro/ssh-key-action.svg
 [link-release]: https://github.com/shimataro/ssh-key-action/releases
 [image-license]: https://img.shields.io/github/license/shimataro/ssh-key-action.svg
diff --git a/lib/index.js b/lib/index.js
index 0fe2f6d..3a2345a 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -485,6 +485,10 @@ function getHomeDirectory() {
     if (home === undefined) {
         throw Error(`${homeEnv} is not defined`);
     }
+    if (home === "/github/home") {
+        // Docker container
+        return "/root";
+    }
     return home;
 }
 /**
diff --git a/src/main.ts b/src/main.ts
index 4333884..b39d10c 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -84,6 +84,12 @@ function getHomeDirectory(): string
 		throw Error(`${homeEnv} is not defined`);
 	}
 
+	if(home === "/github/home")
+	{
+		// Docker container
+		return "/root";
+	}
+
 	return home;
 }