diff --git a/README.md b/README.md
index b2be7a90ec..0fbf3e44ae 100644
--- a/README.md
+++ b/README.md
@@ -361,7 +361,7 @@ Take a look at [Live Query Guide](https://docs.parseplatform.org/parse-server/gu
 
 # GraphQL
 
-[GraphQL](https://graphql.org/), developed by Facebook, is an open-source data query and manipulation language for APIs. In addition to the traditional REST API, Parse Server automatically generates a GraphQL API based on your current application schema.
+[GraphQL](https://graphql.org/), developed by Facebook, is an open-source data query and manipulation language for APIs. In addition to the traditional REST API, Parse Server automatically generates a GraphQL API based on your current application schema. Parse Server also allows you to define your custom GraphQL queries and mutations, whose resolvers can be bound to your cloud code functions.
 
 ## Running
 
@@ -555,6 +555,52 @@ You should receive a response similar to this:
 }
 ```
 
+## Customizing your GraphQL Schema
+
+Parse GraphQL Server allows you to create a custom GraphQL schema with own queries and mutations to be merged with the auto-generated ones. You can resolve these operations using your regular cloud code functions.
+
+To start creating your custom schema, you need to code a `schema.graphql` file and initialize Parse Server with `--graphQLSchema` and `--cloud` options:
+
+```bash
+$ parse-server --appId APPLICATION_ID --masterKey MASTER_KEY --databaseURI mongodb://localhost/test --mountGraphQL --mountPlayground --graphQLSchema ./schema.graphql --cloud ./main.js
+```
+
+### Creating your first custom query
+
+Use the code below for your `schema.graphql` and `main.js` files. Then restart your Parse Server.
+
+```graphql
+# schema.graphql
+extend type Query {
+  hello: String! @resolve
+}
+```
+
+```js
+// main.js
+Parse.Cloud.define('hello', async () => {
+  return 'Hello world!';
+});
+```
+
+You can now run your custom query using GraphQL Playground:
+
+```graphql
+query {
+  hello
+}
+```
+
+You should receive the response below:
+
+```json
+{
+  "data": {
+    "hello": "Hello world!"
+  }
+}
+```
+
 ## Learning more
 
 The [Parse GraphQL Guide](http://docs.parseplatform.org/graphql/guide/) is a very good source for learning how to use the Parse GraphQL API.
diff --git a/src/Options/Definitions.js b/src/Options/Definitions.js
index 4005b2504d..1139050b5f 100644
--- a/src/Options/Definitions.js
+++ b/src/Options/Definitions.js
@@ -158,6 +158,10 @@ module.exports.ParseServerOptions = {
     help: 'Mount path for the GraphQL endpoint, defaults to /graphql',
     default: '/graphql',
   },
+  graphQLSchema: {
+    env: 'PARSE_SERVER_GRAPH_QLSCHEMA',
+    help: 'Full path to your GraphQL custom schema.graphql file',
+  },
   host: {
     env: 'PARSE_SERVER_HOST',
     help: 'The host to serve ParseServer on, defaults to 0.0.0.0',
diff --git a/src/Options/docs.js b/src/Options/docs.js
index fa8d584c94..4883d133c4 100644
--- a/src/Options/docs.js
+++ b/src/Options/docs.js
@@ -28,6 +28,7 @@
  * @property {String} fileKey Key for your files
  * @property {Adapter<FilesAdapter>} filesAdapter Adapter module for the files sub-system
  * @property {String} graphQLPath Mount path for the GraphQL endpoint, defaults to /graphql
+ * @property {String} graphQLSchema Full path to your GraphQL custom schema.graphql file
  * @property {String} host The host to serve ParseServer on, defaults to 0.0.0.0
  * @property {String} javascriptKey Key for the Javascript SDK
  * @property {Boolean} jsonLogs Log as structured JSON objects
diff --git a/src/Options/index.js b/src/Options/index.js
index a1d3c377a2..f45c31b20a 100644
--- a/src/Options/index.js
+++ b/src/Options/index.js
@@ -180,6 +180,8 @@ export interface ParseServerOptions {
   startLiveQueryServer: ?boolean;
   /* Live query server configuration options (will start the liveQuery server) */
   liveQueryServerOptions: ?LiveQueryServerOptions;
+  /* Full path to your GraphQL custom schema.graphql file */
+  graphQLSchema: ?string;
   /* Mounts the GraphQL endpoint
   :ENV: PARSE_SERVER_MOUNT_GRAPHQL
   :DEFAULT: false */
diff --git a/src/ParseServer.js b/src/ParseServer.js
index 738a0624b9..1297127d06 100644
--- a/src/ParseServer.js
+++ b/src/ParseServer.js
@@ -5,7 +5,9 @@ var batch = require('./batch'),
   express = require('express'),
   middlewares = require('./middlewares'),
   Parse = require('parse/node').Parse,
-  path = require('path');
+  { parse } = require('graphql'),
+  path = require('path'),
+  fs = require('fs');
 
 import { ParseServerOptions, LiveQueryServerOptions } from './Options';
 import defaults from './defaults';
@@ -267,9 +269,17 @@ class ParseServer {
     app.use(options.mountPath, this.app);
 
     if (options.mountGraphQL === true || options.mountPlayground === true) {
+      let graphQLCustomTypeDefs = undefined;
+      if (options.graphQLSchema) {
+        graphQLCustomTypeDefs = parse(
+          fs.readFileSync(options.graphQLSchema, 'utf8')
+        );
+      }
+
       const parseGraphQLServer = new ParseGraphQLServer(this, {
         graphQLPath: options.graphQLPath,
         playgroundPath: options.playgroundPath,
+        graphQLCustomTypeDefs,
       });
 
       if (options.mountGraphQL) {