diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -61,19 +61,19 @@ The documentation is available on [honojs.dev](https://honojs.dev).
 
 ## Migration
 
-Migration guide is available on [docs/MIGRATION.md](docs/MIGRATION.md)
+Migration guide is available on [docs/MIGRATION.md](docs/MIGRATION.md).
 
 ## Contributing
 
 Contributions Welcome! You can contribute in the following ways.
 
-- Fix bugs.
-- Create built-in or third-party middleware.
-- Propose new feature.
-- Refactor the code.
-- Write an article about Hono on your Blog.
-- Fix a typo.
-- etc.
+- Create an Issue - Propose a new feature. Report a bug.
+- Pull Request - Fix a bug and typo. Refactor the code.
+- Create third-party middleware - Instruct below.
+- Share - Share your thoughts on the Blog, Twitter, and others.
+- Make your application - Please try to use Hono.
+
+For more details, see [docs/CONTRIBUTING.md](docs/CONTRIBUTING.md).
 
 ## Contributors
 
diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
new file mode 100644
index 00000000..2aa2cd19
--- /dev/null
+++ b/docs/CONTRIBUTING.md
@@ -0,0 +1,92 @@
+# Contribution Guide
+
+Contributions Welcome! We will be grad for your help.
+You can contribute in the following ways.
+
+- Create an Issue - Propose a new feature. Report a bug.
+- Pull Request - Fix a bug and typo. Refactor the code.
+- Create third-party middleware - Instruct below.
+- Share - Share your thoughts on the Blog, Twitter, and others.
+- Make your application - Please try to use Hono.
+
+Note:
+This project is started by Yusuke Wada ([@yusukebe](https://github.com/yusukebe)) for the hobby proposal.
+It was just for fun. For now, this stance has not been changed basically.
+I want to write the code as I like.
+So, if you propose great ideas, but I do not appropriate them, the idea may not be accepted.
+Although, don't worry! Hono is tested well, polished by the contributors, and used by many developers. And I'll try my best to make Hono cool, beautiful, and ultrafast.
+
+## Third-party middleware
+
+Third-party middleware is a middleware that depends on other libraries or works only specific environment such as only Cloudflare Workers. For examples:
+
+- GraphQL Server middleware
+- Firebase Auth middleware
+- Validator middleware
+
+You can make a third-party middleware for Hono by yourself. The repository <https://github.com/honojs/middleware-template> is "_template repository_" which will be helpful for you.
+
+### Repository
+
+If you have a new idea for the middleware, create an issue on "_[github.com/honojs/hono](https://github.com/honojs/hono)_" repository. After discussing it, we (the maintainers of Hono) will make the repository for it and give you the privileges for the repository. For example, if the middleware name is "_hello_", the repository will be:
+
+```
+github.com/honojs/hello
+```
+
+### npm package
+
+We have "_honojs_" organization on npm repository <https://www.npmjs.com/org/honojs>.
+
+If you want to publish the package under the `@honojs` scope, we invite you to the organization.
+Tell us your username of the npm repository.
+After that, we will add you the team and create the skelton of yor package.
+For example, package name will be:
+
+```
+@honojs/hello
+```
+
+And then, you can release the package by yourself using such a `yarn publish` command.
+
+Note:
+We really want to release it using GitHub Actions, but chose this method because the npm organization does not have the access token.
+So, you have to release the package using your individual access token.
+
+### Deno module
+
+Also, you can publish it as Deno module.
+We recommend use _denoify_ <https://www.denoify.land> for supporting Deno.
+In the case of this repository, run the command first:
+
+```
+yarn denoify
+```
+
+The source files will be converted into `deno_dist` directory.
+It's possible to run the module locally or test it with `deno test`.
+
+Finally, publish the module to `deno.land/x`.
+For example, module path will be:
+
+```
+https://deno.land/x/hono_hello/mod.ts
+```
+
+Setting up steps are below:
+
+1. Go to [deno.land/x](https://deno.land/x) web site.
+2. Click the "Publish a module".
+3. Input the module name such as "_hono_hello_".
+4. Specify subdirectory `deno_dist`.
+5. Set up the webhook to deploy.
+
+When push the new tag like `v0.1.0`, it will be distributed:
+
+```
+https://deno.land/x/hono_hello@v0.1.0/mod.ts
+```
+
+Note:
+For setting up the webhook on GitHub, you may need "admin" role.
+If you do not have it, we will set it up for you.