The present invention relates to a portable flashlight, and more particularly to a portable flashlight which has a wireless switching function for turning on or off the flashlight by means of a radio signal in addition to a manual switch provided on the outside of the flashlight. The flashlight can not only be turned on or off by means of an external radio signal, but also be used in various ways such as turning on a part of the lamp or intermittently turning on the flashlight. A flashlight according to the present invention includes a power supply part, a lamp for generating a light by means of the power from the power supply part, and a manual switch connected between the lamp and the power supply part for switching the flashlight, characterized by further including a radio switch in addition to or instead of the manual switch, wherein the radio switch consists of a radio receiver for receiving an external radio signal to operate the radio switch.