diff --git a/packages/rest-api-client/docs/plugin.md b/packages/rest-api-client/docs/plugin.md
index 69c58b624e..ea49e2552e 100644
--- a/packages/rest-api-client/docs/plugin.md
+++ b/packages/rest-api-client/docs/plugin.md
@@ -4,6 +4,7 @@
 - [getRequiredPlugins](#getRequiredPlugins)
 - [getApps](#getApps)
 - [updatePlugin](#updatePlugin)
+- [installPlugin](#installPlugin)
 
 ## Overview
 
@@ -119,3 +120,24 @@ Updates an imported plug-in in the Kintone environment.
 #### Reference
 
 - https://kintone.dev/en/docs/kintone/rest-api/plugins/update-plugin/
+
+### installPlugin
+
+Install an imported plug-in in the Kintone environment.
+
+#### Parameters
+
+| Name    |  Type  | Required | Description                                                                                                                                                                                       |
+| ------- | :----: | :------: | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| fileKey | String |   Yes    | The fileKey representing an uploaded file.<br />Use the following API to upload the file and retrieve the fileKey: [Upload File](https://kintone.dev/en/docs/kintone/rest-api/files/upload-file/) |
+
+#### Returns
+
+| Name    |  Type  | Description                        |
+| ------- | :----: | ---------------------------------- |
+| id      | String | The installed plug-in ID.          |
+| version | String | The version number of the plug-in. |
+
+#### Reference
+
+- https://kintone.dev/en/docs/kintone/rest-api/plugins/install-plugin/
diff --git a/packages/rest-api-client/src/client/PluginClient.ts b/packages/rest-api-client/src/client/PluginClient.ts
index 2c6f580f89..e493f6f77a 100644
--- a/packages/rest-api-client/src/client/PluginClient.ts
+++ b/packages/rest-api-client/src/client/PluginClient.ts
@@ -8,6 +8,8 @@ import type {
   GetRequiredPluginsForResponse,
   UpdatePluginForRequest,
   UpdatePluginForResponse,
+  InstallPluginForRequest,
+  InstallPluginForResponse,
 } from "./types/plugin";
 
 export class PluginClient extends BaseClient {
@@ -36,4 +38,11 @@ export class PluginClient extends BaseClient {
     const path = this.buildPath({ endpointName: "plugin" });
     return this.client.put(path, params);
   }
+
+  public installPlugin(
+    params: InstallPluginForRequest,
+  ): Promise<InstallPluginForResponse> {
+    const path = this.buildPath({ endpointName: "plugin" });
+    return this.client.post(path, params);
+  }
 }
diff --git a/packages/rest-api-client/src/client/__tests__/PluginClient.test.ts b/packages/rest-api-client/src/client/__tests__/PluginClient.test.ts
index 665c8712e6..07955408d4 100644
--- a/packages/rest-api-client/src/client/__tests__/PluginClient.test.ts
+++ b/packages/rest-api-client/src/client/__tests__/PluginClient.test.ts
@@ -96,4 +96,22 @@ describe("PluginClient", () => {
       expect(mockClient.getLogs()[0].params).toEqual(params);
     });
   });
+
+  describe("installPlugin", () => {
+    const params = {
+      fileKey: "fileKey",
+    };
+    beforeEach(async () => {
+      await pluginClient.installPlugin(params);
+    });
+    it("should pass the path to the http client", () => {
+      expect(mockClient.getLogs()[0].path).toBe("/k/v1/plugin.json");
+    });
+    it("should send a POST request", () => {
+      expect(mockClient.getLogs()[0].method).toBe("post");
+    });
+    it("should pass the param to the http client", () => {
+      expect(mockClient.getLogs()[0].params).toEqual(params);
+    });
+  });
 });
diff --git a/packages/rest-api-client/src/client/types/plugin/index.ts b/packages/rest-api-client/src/client/types/plugin/index.ts
index 5cd3079e4d..387b46303b 100644
--- a/packages/rest-api-client/src/client/types/plugin/index.ts
+++ b/packages/rest-api-client/src/client/types/plugin/index.ts
@@ -46,3 +46,12 @@ export type UpdatePluginForResponse = {
   id: PluginID;
   version: string;
 };
+
+export type InstallPluginForRequest = {
+  fileKey: string;
+};
+
+export type InstallPluginForResponse = {
+  id: PluginID;
+  version: string;
+};