diff --git a/types/ps-tree/index.d.ts b/types/ps-tree/index.d.ts
new file mode 100644
index 0000000000..ff60b6241e
--- /dev/null
+++ b/types/ps-tree/index.d.ts
@@ -0,0 +1,22 @@
+// Type definitions for ps-tree 1.1
+// Project: http://github.com/indexzero/ps-tree
+// Definitions by: Alessio Paccoia <https://github.com/alessiopcc>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.7
+
+declare namespace ps_tree {
+    interface PS {
+        COMMAND: string;
+        PPID: string;
+        PID: string;
+        STAT: string;
+    }
+
+    const prototype: {
+    };
+}
+
+declare function ps_tree(pid: number, callback: (error: Error, children: ReadonlyArray<ps_tree.PS>) => void): void;
+
+export as namespace ps_tree;
+export = ps_tree;
diff --git a/types/ps-tree/ps-tree-tests.ts b/types/ps-tree/ps-tree-tests.ts
new file mode 100644
index 0000000000..2ef6c48c27
--- /dev/null
+++ b/types/ps-tree/ps-tree-tests.ts
@@ -0,0 +1,9 @@
+import ps_tree from "ps-tree";
+
+ps_tree(1, () => {}); // $ExpectType void
+ps_tree(1, (error: Error, children: ReadonlyArray<ps_tree.PS>) => {
+    children[0].COMMAND; // $ExpectType string
+    children[0].PID; // $ExpectType string
+    children[0].PPID; // $ExpectType string
+    children[0].STAT; // $ExpectType string
+});
diff --git a/types/ps-tree/tsconfig.json b/types/ps-tree/tsconfig.json
new file mode 100644
index 0000000000..9bb8c2d8e1
--- /dev/null
+++ b/types/ps-tree/tsconfig.json
@@ -0,0 +1,24 @@
+{
+    "compilerOptions": {
+        "esModuleInterop": true,
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "ps-tree-tests.ts"
+    ]
+}
diff --git a/types/ps-tree/tslint.json b/types/ps-tree/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/ps-tree/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }