任务管理器（英语：Task Manager），是在Windows系统中管理应用程序和处理进程的工具，通常由Windows自带，也有提供增强功能的第三方软件。任务管理器可以让用户查看当前运行的处理进程(Win 8添加，原本的程序名称移到[详细数据])、性能(Win 8后，合并[网络功能]，并改为点击显示)、应用程序历程记录(Win 8添加)、启动(Win 8添加)、用户(Win 8添加)、详细数据(原Win Vista, 7的[处理进程])、服务(原Win Vista, 7所有的)以及系统对内置内存和CPU的资源占用，并可以强制结束某些进程和进程，此外还可以监控系统资源的使用状况。

Task Manager, previously known as Windows Task Manager, is a task manager, system monitor, and startup manager included with Microsoft Windows systems. It provides limited information about computer performance and running applications, processes and CPU usage, commit charge and memory information, network activity and statistics, logged-in users, and system services. The Task Manager can also be used to set process priorities, processor affinity, forcibly terminate processes, and shut down, restart, hibernate, or log off from Windows. Windows Task Manager was introduced with Windows NT 4.0. Previous versions of Windows NT included the Task List application, which had far fewer features. The task list was capable of listing currently running processes and killing them, or creating a new process. In Windows XP only, a Shutdown menu is also present that allows access to Standby, Hibernate, Turn off, Restart, Log Off, and Switch User.