Abstract: A photothermic desoldering unit includes a console provided with a switch and a temperature control knob, and a working frame mounted on a top of the console. A light source is provided in the working frame and an aluminum plate is fixed near an open top of the working. frame to close the same and reflect light emitted from the light source. Temperature sensors are provided at an inner side of the aluminum plate to sense a surface temperature thereof. Power supply to the light source and luminance of the light source are controlled by the switch and the temperature control knob, respectively. When a surface temperature of the aluminum plate sensed by the sensors is the same as a temperature value set through the temperature control knob, power supply to the light source is disconnected.