diff --git a/src/index.ts b/src/index.ts
index db93b83..b113cb4 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -83,7 +83,16 @@ const generateMockValue = (
     }
 };
 
-// eslint-disable-next-line @typescript-eslint/no-empty-interface
+const getMockString = (typeName: string, fields: string) => {
+    return `
+export const ${toMockName(typeName)} = (overrides?: Partial<${typeName}>): ${typeName} => {
+    return {
+${fields}
+        ...overrides
+    };
+};`;
+}
+
 export interface TypescriptMocksPluginConfig {
     typesFile?: string;
 }
@@ -138,11 +147,27 @@ export const plugin: PluginFunction<TypescriptMocksPluginConfig> = (schema, docu
                 },
             };
         },
+        InputObjectTypeDefinition: node => {
+            const fieldName = node.name.value;
+
+            return {
+                typeName: fieldName,
+                mockFn: () => {
+                    const mockFields = node.fields ? node.fields.map((field) => {
+                        const value = generateMockValue(fieldName, field.name.value, types, field.type);
+
+                        return `        ${field.name.value}: ${value},`;
+                    }).join('\n') : '';
+
+                    return getMockString(fieldName, mockFields);
+                },
+            };
+        },
         ObjectTypeDefinition: node => {
             // This function triggered per each type
             const typeName = node.name.value;
 
-            if (typeName === 'Query') {
+            if (typeName === 'Query' || typeName === 'Mutation') {
                 return null;
             }
 
@@ -152,13 +177,7 @@ export const plugin: PluginFunction<TypescriptMocksPluginConfig> = (schema, docu
                 mockFn: () => {
                     const mockFields = fields ? fields.map(({ mockFn }: any) => mockFn(typeName)).join('\n') : '';
 
-                    return `
-export const ${toMockName(typeName)} = (overrides?: Partial<${typeName}>): ${typeName} => {
-    return {
-${mockFields}
-        ...overrides
-    };
-};`;
+                    return getMockString(typeName, mockFields);
                 },
             };
         },
diff --git a/tests/__snapshots__/typescript-mock-data.spec.ts.snap b/tests/__snapshots__/typescript-mock-data.spec.ts.snap
index f195a3f..7f35ec9 100644
--- a/tests/__snapshots__/typescript-mock-data.spec.ts.snap
+++ b/tests/__snapshots__/typescript-mock-data.spec.ts.snap
@@ -10,6 +10,15 @@ export const anAvatar = (overrides?: Partial<Avatar>): Avatar => {
     };
 };
 
+export const aUpdateUserInput = (overrides?: Partial<UpdateUserInput>): UpdateUserInput => {
+    return {
+        id: '1d6a9360-c92b-4660-8e5f-04155047bddc',
+        login: 'qui',
+        avatar: anAvatar(),
+        ...overrides
+    };
+};
+
 export const aUser = (overrides?: Partial<User>): User => {
     return {
         id: 'a5756f00-41a6-422a-8a7d-d13ee6a63750',
@@ -23,7 +32,7 @@ export const aUser = (overrides?: Partial<User>): User => {
 
 exports[`should generate mock data functions with external types file import 1`] = `
 "/* eslint-disable @typescript-eslint/no-use-before-define,@typescript-eslint/no-unused-vars */
-import { Avatar, User } from './types/graphql';
+import { Avatar, UpdateUserInput, User } from './types/graphql';
 
 export const anAvatar = (overrides?: Partial<Avatar>): Avatar => {
     return {
@@ -33,6 +42,15 @@ export const anAvatar = (overrides?: Partial<Avatar>): Avatar => {
     };
 };
 
+export const aUpdateUserInput = (overrides?: Partial<UpdateUserInput>): UpdateUserInput => {
+    return {
+        id: '1d6a9360-c92b-4660-8e5f-04155047bddc',
+        login: 'qui',
+        avatar: anAvatar(),
+        ...overrides
+    };
+};
+
 export const aUser = (overrides?: Partial<User>): User => {
     return {
         id: 'a5756f00-41a6-422a-8a7d-d13ee6a63750',
diff --git a/tests/typescript-mock-data.spec.ts b/tests/typescript-mock-data.spec.ts
index 2185ed5..11b0609 100644
--- a/tests/typescript-mock-data.spec.ts
+++ b/tests/typescript-mock-data.spec.ts
@@ -1,6 +1,6 @@
 import '@graphql-codegen/testing';
 
-import { buildSchema, print } from 'graphql';
+import { buildSchema } from 'graphql';
 import { plugin } from '../src';
 
 const testSchema = buildSchema(/* GraphQL */ `
@@ -18,6 +18,16 @@ const testSchema = buildSchema(/* GraphQL */ `
     type Query {
         user: User!
     }
+
+    input UpdateUserInput {
+        id: ID!
+        login: String
+        avatar: Avatar
+    }
+
+    type Mutation {
+        updateUser(user: UpdateUserInput): User
+    }
 `);
 
 it('can be called', async () => {
@@ -35,6 +45,6 @@ it('should generate mock data functions with external types file import', async
     const result = await plugin(testSchema, [], { typesFile: './types/graphql.ts' });
 
     expect(result).toBeDefined();
-    expect(result).toContain("import { Avatar, User } from './types/graphql';");
+    expect(result).toContain("import { Avatar, UpdateUserInput, User } from './types/graphql';");
     expect(result).toMatchSnapshot();
 });