There are provided a task display switching method, a portable apparatus and a portable communications apparatus which, when a plurality of application software are activated and processed in parallel, make it possible to switch a display between each of the application software with ease. According to the task display switching method, the portable apparatus and the portable communications apparatus of the present invention, in a portable apparatus capable of processing a plurality of tasks in parallel and of displaying a plurality of display regions for displaying data, an icon associated with a task displayed on a first display region is generated automatically or manually, and the generated icon is displayed in a second display region. When any icon thus generated is selected from a plurality of icons displayed on the second display region, the task associated with the selected icon is restored and displayed in the first display region.