Abstract: A telescopic flashlight of the present invention is constructed such that a light-emitting part having a power supply and a lighting member is mounted on the tip of a telescopic arm member, and a cap member in the shape of a cap is detachably mounted on the tip of the light-emitting part, and a magnet, a lens, or the like is attached to the cap member and is designed to be fit to the butt end of the telescopic arm member when it is not used. In addition, a mirror, a magnifying lens, or the like may be attached to the external side of the cap member.