diff --git a/types/node/test/worker_threads.ts b/types/node/test/worker_threads.ts
index 35a5fe5ef017919..38c7648f246e01f 100644
--- a/types/node/test/worker_threads.ts
+++ b/types/node/test/worker_threads.ts
@@ -240,3 +240,11 @@ import { createContext } from "node:vm";
     const arrayBuffer = new ArrayBuffer(0);
     structuredClone({ test: arrayBuffer }, { transfer: [arrayBuffer] }); // $ExpectType { test: ArrayBuffer; }
 }
+
+{
+    const { port1 } = new workerThreads.MessageChannel();
+    workerThreads.postMessageToThread(10, { port: port1 }, [port1], 1000);
+    workerThreads.postMessageToThread(10, { port: port1 }, [port1]);
+    workerThreads.postMessageToThread(10, { x: 100 }, 1000);
+    workerThreads.postMessageToThread(10, { x: 100 });
+}
diff --git a/types/node/v20/test/worker_threads.ts b/types/node/v20/test/worker_threads.ts
index 37948e1fba6067a..aeaac9f9e56293a 100644
--- a/types/node/v20/test/worker_threads.ts
+++ b/types/node/v20/test/worker_threads.ts
@@ -223,3 +223,11 @@ import { createContext } from "node:vm";
     const arrayBuffer = new ArrayBuffer(0);
     structuredClone({ test: arrayBuffer }, { transfer: [arrayBuffer] }); // $ExpectType { test: ArrayBuffer; }
 }
+
+{
+    const { port1 } = new workerThreads.MessageChannel();
+    workerThreads.postMessageToThread(10, { port: port1 }, [port1], 1000);
+    workerThreads.postMessageToThread(10, { port: port1 }, [port1]);
+    workerThreads.postMessageToThread(10, { x: 100 }, 1000);
+    workerThreads.postMessageToThread(10, { x: 100 });
+}
diff --git a/types/node/v20/worker_threads.d.ts b/types/node/v20/worker_threads.d.ts
index dfe7b3431d1a252..89603a84c9166b9 100644
--- a/types/node/v20/worker_threads.d.ts
+++ b/types/node/v20/worker_threads.d.ts
@@ -676,6 +676,24 @@ declare module "worker_threads" {
      * for the `key` will be deleted.
      */
     function setEnvironmentData(key: Serializable, value?: Serializable): void;
+    /**
+     * Sends a value to another worker, identified by its thread ID.
+     * @param threadId The target thread ID. If the thread ID is invalid, a `ERR_WORKER_MESSAGING_FAILED` error will be thrown.
+     * If the target thread ID is the current thread ID, a `ERR_WORKER_MESSAGING_SAME_THREAD` error will be thrown.
+     * @param value The value to send.
+     * @param transferList If one or more `MessagePort`-like objects are passed in value, a `transferList` is required for those items
+     * or `ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST` is thrown. See `port.postMessage()` for more information.
+     * @param timeout Time to wait for the message to be delivered in milliseconds. By default it's `undefined`, which means wait forever.
+     * If the operation times out, a `ERR_WORKER_MESSAGING_TIMEOUT` error is thrown.
+     * @since v22.5.0
+     */
+    function postMessageToThread(threadId: number, value: any, timeout?: number): Promise<void>;
+    function postMessageToThread(
+        threadId: number,
+        value: any,
+        transferList: readonly Transferable[],
+        timeout?: number,
+    ): Promise<void>;
 
     import {
         BroadcastChannel as _BroadcastChannel,
diff --git a/types/node/v22/test/worker_threads.ts b/types/node/v22/test/worker_threads.ts
index 35a5fe5ef017919..38c7648f246e01f 100644
--- a/types/node/v22/test/worker_threads.ts
+++ b/types/node/v22/test/worker_threads.ts
@@ -240,3 +240,11 @@ import { createContext } from "node:vm";
     const arrayBuffer = new ArrayBuffer(0);
     structuredClone({ test: arrayBuffer }, { transfer: [arrayBuffer] }); // $ExpectType { test: ArrayBuffer; }
 }
+
+{
+    const { port1 } = new workerThreads.MessageChannel();
+    workerThreads.postMessageToThread(10, { port: port1 }, [port1], 1000);
+    workerThreads.postMessageToThread(10, { port: port1 }, [port1]);
+    workerThreads.postMessageToThread(10, { x: 100 }, 1000);
+    workerThreads.postMessageToThread(10, { x: 100 });
+}
diff --git a/types/node/v22/worker_threads.d.ts b/types/node/v22/worker_threads.d.ts
index 9cb2923ee6c4462..d48fbabf4d3c53e 100644
--- a/types/node/v22/worker_threads.d.ts
+++ b/types/node/v22/worker_threads.d.ts
@@ -738,6 +738,24 @@ declare module "worker_threads" {
      * for the `key` will be deleted.
      */
     function setEnvironmentData(key: Serializable, value?: Serializable): void;
+    /**
+     * Sends a value to another worker, identified by its thread ID.
+     * @param threadId The target thread ID. If the thread ID is invalid, a `ERR_WORKER_MESSAGING_FAILED` error will be thrown.
+     * If the target thread ID is the current thread ID, a `ERR_WORKER_MESSAGING_SAME_THREAD` error will be thrown.
+     * @param value The value to send.
+     * @param transferList If one or more `MessagePort`-like objects are passed in value, a `transferList` is required for those items
+     * or `ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST` is thrown. See `port.postMessage()` for more information.
+     * @param timeout Time to wait for the message to be delivered in milliseconds. By default it's `undefined`, which means wait forever.
+     * If the operation times out, a `ERR_WORKER_MESSAGING_TIMEOUT` error is thrown.
+     * @since v22.5.0
+     */
+    function postMessageToThread(threadId: number, value: any, timeout?: number): Promise<void>;
+    function postMessageToThread(
+        threadId: number,
+        value: any,
+        transferList: readonly Transferable[],
+        timeout?: number,
+    ): Promise<void>;
 
     import {
         BroadcastChannel as _BroadcastChannel,
diff --git a/types/node/worker_threads.d.ts b/types/node/worker_threads.d.ts
index e14d367f1f9bba8..a31f7846178842b 100644
--- a/types/node/worker_threads.d.ts
+++ b/types/node/worker_threads.d.ts
@@ -739,6 +739,24 @@ declare module "worker_threads" {
      * for the `key` will be deleted.
      */
     function setEnvironmentData(key: Serializable, value?: Serializable): void;
+    /**
+     * Sends a value to another worker, identified by its thread ID.
+     * @param threadId The target thread ID. If the thread ID is invalid, a `ERR_WORKER_MESSAGING_FAILED` error will be thrown.
+     * If the target thread ID is the current thread ID, a `ERR_WORKER_MESSAGING_SAME_THREAD` error will be thrown.
+     * @param value The value to send.
+     * @param transferList If one or more `MessagePort`-like objects are passed in value, a `transferList` is required for those items
+     * or `ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST` is thrown. See `port.postMessage()` for more information.
+     * @param timeout Time to wait for the message to be delivered in milliseconds. By default it's `undefined`, which means wait forever.
+     * If the operation times out, a `ERR_WORKER_MESSAGING_TIMEOUT` error is thrown.
+     * @since v22.5.0
+     */
+    function postMessageToThread(threadId: number, value: any, timeout?: number): Promise<void>;
+    function postMessageToThread(
+        threadId: number,
+        value: any,
+        transferList: readonly Transferable[],
+        timeout?: number,
+    ): Promise<void>;
 
     import {
         BroadcastChannel as _BroadcastChannel,