diff --git a/examples/rest-api-client-demo/src/space.ts b/examples/rest-api-client-demo/src/space.ts
index 24d859a241..b72412dd70 100644
--- a/examples/rest-api-client-demo/src/space.ts
+++ b/examples/rest-api-client-demo/src/space.ts
@@ -33,4 +33,42 @@ export class Space {
       console.log(error);
     }
   }
+
+  public async updateSpaceMembers() {
+    const spaceMembers = {
+      id: SPACE_ID,
+      members: [
+        {
+          entity: {
+            type: "USER" as const,
+            code: "user1",
+          },
+          isAdmin: true,
+          includeSubs: false,
+        },
+        {
+          entity: {
+            type: "USER" as const,
+            code: "user2",
+          },
+          isAdmin: false,
+          includeSubs: false,
+        },
+        {
+          entity: {
+            type: "GROUP" as const,
+            code: "group1",
+          },
+          isAdmin: false,
+          includeSubs: true,
+        },
+      ],
+    };
+
+    try {
+      console.log(await this.client.space.updateSpaceMembers(spaceMembers));
+    } catch (error) {
+      console.log(error);
+    }
+  }
 }
diff --git a/packages/rest-api-client/docs/space.md b/packages/rest-api-client/docs/space.md
index 5d096e5549..6c8b6212e6 100644
--- a/packages/rest-api-client/docs/space.md
+++ b/packages/rest-api-client/docs/space.md
@@ -3,6 +3,7 @@
 - [getSpace](#getSpace)
 - [deleteSpace](#deleteSpace)
 - [updateSpaceBody](#updateSpaceBody)
+- [updateSpaceMembers](#updateSpaceMembers)
 
 ## Overview
 
@@ -116,3 +117,27 @@ An empty object.
 #### Reference
 
 - https://kintone.dev/en/docs/kintone/rest-api/spaces/update-space-body/
+
+### updateSpaceMembers
+
+Updates the members of a Space.
+
+#### Parameters
+
+| Name                  |       Type       |  Required   | Description                                                                                                                                                                                                                                                                                                                                          |
+| --------------------- | :--------------: | :---------: | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| id                    | Number or String |     Yes     | The space ID.                                                                                                                                                                                                                                                                                                                                        |
+| members               |      Array       |     Yes     | A list of members of the Space. <br />At least one Space Administrator must be specified.<br /> Inactive and deleted users cannot be specified.                                                                                                                                                                                                      |
+| members[].entity      |      Object      |     Yes     | The entity information of the Space member. <br />Guest users cannot be specified.                                                                                                                                                                                                                                                                   |
+| members[].entity.type |      String      |     Yes     | The entity type of the Space member.<br /><ul><li><strong>USER</strong>: User</li><strong>Group</strong>: Group</li><strong>ORGANIZATION</strong>: Department</li><ul>                                                                                                                                                                               |
+| members[].entity.code |      String      |     Yes     | The code of the entity.                                                                                                                                                                                                                                                                                                                              |
+| members[].isAdmin     |     Boolean      | Conditional | The Space Administration settings of the user.<br /><ul><strong>true</strong>: The member will be the Administrator of the Space.<br /><li><strong>false</strong>: The member will not be the Administrator of the Space.<br />At least 1 Space Administrator is required to be set in the API call.</li></ul><br />If ignored, this value is false. |
+| members[].includeSubs |     Boolean      |  Optional   | The "Include Affiliated Departments" settings of the department.<br /><ul><strong>true</strong>: Affiliated departments will be included.<br /><li><strong>false</strong>: Affiliated departments will not be included.</li></ul><br />If ignored, this value is false.                                                                              |
+
+#### Returns
+
+An empty object.
+
+#### Reference
+
+- https://kintone.dev/en/docs/kintone/rest-api/spaces/update-space-members/
diff --git a/packages/rest-api-client/src/client/SpaceClient.ts b/packages/rest-api-client/src/client/SpaceClient.ts
index 40dd921de6..0c1af4539b 100644
--- a/packages/rest-api-client/src/client/SpaceClient.ts
+++ b/packages/rest-api-client/src/client/SpaceClient.ts
@@ -1,4 +1,4 @@
-import type { SpaceID, Space } from "./types";
+import type { SpaceID, Space, SpaceMemberForRequest } from "./types";
 import { BaseClient } from "./BaseClient";
 
 export class SpaceClient extends BaseClient {
@@ -22,4 +22,14 @@ export class SpaceClient extends BaseClient {
     });
     return this.client.put(path, params);
   }
+
+  public updateSpaceMembers(params: {
+    id: SpaceID;
+    members: SpaceMemberForRequest[];
+  }): Promise<{}> {
+    const path = this.buildPathWithGuestSpaceId({
+      endpointName: "space/members",
+    });
+    return this.client.put(path, params);
+  }
 }
diff --git a/packages/rest-api-client/src/client/__tests__/SpaceClient.test.ts b/packages/rest-api-client/src/client/__tests__/SpaceClient.test.ts
index 69ce827e6d..d14df55977 100644
--- a/packages/rest-api-client/src/client/__tests__/SpaceClient.test.ts
+++ b/packages/rest-api-client/src/client/__tests__/SpaceClient.test.ts
@@ -72,6 +72,48 @@ describe("SpaceClient", () => {
       expect(mockClient.getLogs()[0].params).toEqual(params);
     });
   });
+
+  describe("updateSpaceMembers", () => {
+    const params = {
+      id: SPACE_ID,
+      members: [
+        {
+          entity: {
+            code: "user1",
+            type: "USER" as const,
+          },
+          isAdmin: true,
+        },
+        {
+          entity: {
+            code: "user2",
+            type: "USER" as const,
+          },
+          isAdmin: false,
+        },
+        {
+          entity: {
+            code: "group1",
+            type: "GROUP" as const,
+          },
+          isAdmin: false,
+          includeSubs: true,
+        },
+      ],
+    };
+    beforeEach(async () => {
+      await spaceClient.updateSpaceMembers(params);
+    });
+    it("should pass the path to the http client", () => {
+      expect(mockClient.getLogs()[0].path).toBe("/k/v1/space/members.json");
+    });
+    it("should send a PUT request", () => {
+      expect(mockClient.getLogs()[0].method).toBe("put");
+    });
+    it("should pass id, members parameters to the http client", () => {
+      expect(mockClient.getLogs()[0].params).toEqual(params);
+    });
+  });
 });
 
 describe("SpaceClient with guestSpaceId", () => {
diff --git a/packages/rest-api-client/src/client/types/space/index.ts b/packages/rest-api-client/src/client/types/space/index.ts
index 7e61ba82b7..50ca1afa1c 100644
--- a/packages/rest-api-client/src/client/types/space/index.ts
+++ b/packages/rest-api-client/src/client/types/space/index.ts
@@ -1,4 +1,5 @@
 import type { App } from "../app";
+import type { Entity } from "../entity";
 
 type AttachedApp = Pick<
   App,
@@ -30,3 +31,9 @@ export type Space = {
   attachedApps: AttachedApp[];
   fixedMember: boolean;
 };
+
+export type SpaceMemberForRequest = {
+  entity: Entity;
+  isAdmin?: boolean;
+  includeSubs?: boolean;
+};