diff --git a/types/app-root-dir/app-root-dir-tests.ts b/types/app-root-dir/app-root-dir-tests.ts
new file mode 100644
index 0000000000..eecfc42d03
--- /dev/null
+++ b/types/app-root-dir/app-root-dir-tests.ts
@@ -0,0 +1,7 @@
+import * as rootDir from 'app-root-dir'
+
+let appRootPath: string
+
+rootDir.set(__dirname)
+appRootPath = rootDir.get()
+
diff --git a/types/app-root-dir/index.d.ts b/types/app-root-dir/index.d.ts
new file mode 100644
index 0000000000..9c7fb51cbc
--- /dev/null
+++ b/types/app-root-dir/index.d.ts
@@ -0,0 +1,21 @@
+import { interfaceExtends } from '../babel-types/index.d'
+// Type definitions for [ app-root-dir ] [ 1.0.2 ]
+// Project : [ https://github.com/philidem/node-app-root-dir ]
+// Definitions by: shaochenyang <https://github.com/chenyang-biu>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+interface AppRootDir {
+  // Get the application's root directory
+  get(): string
+  /**
+   * Set the application's root directory
+   *    this will set a global so that no matter
+   *    how many instances of app-root-dir module are installed,
+   *    they will all return the same directory
+   */
+  set(dirname: string): void
+}
+
+declare const AppRootDir: AppRootDir
+
+export = AppRootDir
diff --git a/types/app-root-dir/tsconfig.json b/types/app-root-dir/tsconfig.json
new file mode 100644
index 0000000000..c3a03ef0b7
--- /dev/null
+++ b/types/app-root-dir/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": false,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": ["node"],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "app-root-dir-tests.ts"
+    ]
+}
diff --git a/types/app-root-dir/tslint.json b/types/app-root-dir/tslint.json
new file mode 100644
index 0000000000..d88586e5bd
--- /dev/null
+++ b/types/app-root-dir/tslint.json
@@ -0,0 +1,3 @@
+{
+  "extends": "dtslint/dt.json"
+}