Abstract: A laser light medical treatment apparatus has a contact detection means comprising a pair of contact tips 16a, 16b on both sides of a laser light emission hole 6 so that when the hand set 1, 30 of the apparatus is applied on the skin of a patient. The contact tips detect touching on the skin by means of a small conduction current thereacross, thereby closing a switching circuit 46, 44 to actuate the laser 4 to oscillate. In addition, warning sound means 8 and warning lamp means 7 are provided so as to warn of the light beam emission of the laser, which light is invisible and dangerous to the human eye.