To provide a portable terminal device which can be prevented from being used illegally in a case where the portable terminal is moved by robbery or the like, without requiring authentication prior to use or a standing wireless device.

The portable terminal device comprises: a GPS receiving section 4 being a location detecting means for detecting a location of the present terminal device from information from a GPS satellite; a memory 7 being a storage means for storing area information to allow use of the present terminal device; and a control section 6 being a control means for controlling the present terminal device to be active/inactive in accordance with a result of comparison between the location of the present terminal device detected by the location detecting means and the area information stored in the storage means.