diff --git a/README.md b/README.md
index 97a6ba843..57bc26285 100755
--- a/README.md
+++ b/README.md
@@ -218,6 +218,7 @@ List of Definitions
 * [NProgress](https://github.com/rstacruz/nprogress) (by [Judah Gabriel Himango](https://github.com/judahgabriel))
 * [Numeral.js](https://github.com/adamwdraper/Numeral-js) (by [Vincent Bortone](https://github.com/vbortone/))
 * [OpenLayers](https://github.com/openlayers/openlayers) (by [Ilya Bolkhovsky](https://github.com/bolhovsky/))
+* [Passport](http://passportjs.org/) (by [Hiroki Horiuchi](https://github.com/horiuchi/))
 * [Parallel.js](https://github.com/adambom/parallel.js) (by [Josh Baldwin](https://github.com/jbaldwin))
 * [Parsimmon](https://github.com/jayferd/parsimmon) (by [Bart van der Schoor](https://github.com/Bartvds))
 * [PDF.js](https://github.com/mozilla/pdf.js) (by [Josh Baldwin](https://github.com/jbaldwin))
diff --git a/passport/passport-test.ts b/passport/passport-test.ts
new file mode 100644
index 000000000..f102b306e
--- /dev/null
+++ b/passport/passport-test.ts
@@ -0,0 +1,61 @@
+/// <reference path="passport.d.ts" />
+/// <reference path="../express/express.d.ts" />
+
+import express = require('express');
+import passport = require('passport');
+
+class TestStrategy implements passport.Strategy {
+  public name: string = 'test';
+  constructor() {}
+  authenticate(req: passport.Request) {}
+}
+
+passport.use(new TestStrategy());
+passport.framework('test');
+passport.serializeUser((user, done) => {});
+passport.deserializeUser((id, done) => {});
+
+passport.use(new TestStrategy())
+  .unuse('test')
+  .use(new TestStrategy())
+  .framework('test-fw');
+
+
+var app = express();
+app.configure(() => {
+  app.use(passport.initialize());
+  app.use(passport.session());
+});
+
+app.post('/login', 
+  passport.authenticate('local', { failureRedirect: '/login', failureFlash: true }),
+  function(req, res) {
+    res.redirect('/');
+  });
+
+app.post('/login', function(req: passport.Request, res: passport.Response, next: (err?: any) => void) {
+  passport.authenticate('local', function(err, user, info) {
+    if (err) { return next(err) }
+    if (!user) {
+      req.session.error = info.message;
+      return res.redirect('/login')
+    }
+    req.logIn(user, function(err) {
+      if (err) { return next(err); }
+      return res.redirect('/users/' + user.username);
+    });
+  })(req, res, next);
+});
+
+app.get('/logout', function(req: passport.Request, res: passport.Response) {
+  req.logout();
+  res.redirect('/');
+});
+
+function ensureAuthenticated(req: passport.Request, res: passport.Response, next: (err?: any) => void) {
+  if (req.isAuthenticated()) { return next(); }
+  if (req.isUnauthenticated()) {
+    res.redirect('/login');
+  }
+}
+
diff --git a/passport/passport.d.ts b/passport/passport.d.ts
new file mode 100644
index 000000000..ae401b252
--- /dev/null
+++ b/passport/passport.d.ts
@@ -0,0 +1,60 @@
+// Type definitions for Passport v0.2.0
+// Project: http://passportjs.org
+// Definitions by: Horiuchi_H <https://github.com/horiuchi/>
+// DefinitelyTyped: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../express/express.d.ts" />
+
+declare module 'passport' {
+    import express = require('express');
+
+    function use(strategy: Strategy): Passport;
+    function use(name: string, strategy: Strategy): Passport;
+    function unuse(name: string): Passport;
+    function framework(fw: string): Passport;
+    function initialize(options?: { userProperty: string; }): express.Handler;
+    function session(options?: { pauseStream: boolean; }): express.Handler;
+
+    function authenticate(strategy: string, options: Object, callback?: express.Handler): express.Handler;
+    function authenticate(strategy: string, callback2: (err: any, user: any, info: any) => void): express.Handler;
+    function authorize(strategy: string, options: Object, callback?: express.Handler): express.Handler;
+    function serializeUser(fn: (user: any, done: (err: any, id: any) => void) => void): void;
+    function deserializeUser(fn: (id: any, done: (err: any, user: any) => void) => void): void;
+    function transformAuthInfo(fn: (info: any, done: (err: any, info: any) => void) => void): void;
+
+    interface Passport {
+        use(strategy: Strategy): Passport;
+        use(name: string, strategy: Strategy): Passport;
+        unuse(name: string): Passport;
+        framework(fw: string): Passport;
+        initialize(options?: { userProperty: string; }): express.Handler;
+        session(options?: { pauseStream: boolean; }): express.Handler;
+
+        authenticate(strategy: string, callback2: (err: any, user: any, info: any) => void): express.Handler;
+        authenticate(strategy: string, options: Object, callback?: express.Handler): express.Handler;
+        authorize(strategy: string, options: Object, callback?: express.Handler): express.Handler;
+        serializeUser(fn: (user: any, done: (err: any, id: any) => void) => void): void;
+        deserializeUser(fn: (id: any, done: (err: any, user: any) => void) => void): void;
+        transformAuthInfo(fn: (info: any, done: (err: any, info: any) => void) => void): void;
+    }
+
+    interface Request extends express.Request {
+        login(user: any, done: (err: any) => void): void;
+        login(user: any, options: Object, done: (err: any) => void): void;
+        logIn(user: any, done: (err: any) => void): void;
+        logIn(user: any, options: Object, done: (err: any) => void): void;
+
+        logout(): void;
+        logOut(): void;
+
+        isAuthenticated(): boolean;
+        isUnauthenticated(): boolean;
+    }
+    interface Response extends express.Response {}
+
+    interface Strategy {
+        name?: string;
+        authenticate(req: Request, options?: Object): void;
+    }
+}
+