A hair treatment promoting apparatus in which a reflector provided with a heater for radiating infrared rays is rotated by a motor so that the infrared rays are radiated to the top, back and both sides of a head of a subject. The heater and reflecting plate form a heating device rotated by the motor and a disk is provided which rotates with the motor. The disk is provided with a slit for a home position and slits for stopping arranged on both sides thereof, and energization of the motor is interrupted when the slit for the home position is detected within a prescribed time elapsed from when the slit for stopping is detected in the direction of rotating the heating device, thereby stopping the heating device at the home position.