FIELD : medicine.SUBSTANCE : invention relates to medical equipment and is intended for cleaning teeth. Device for cleaning teeth contains a handle, a fluid supply system for supplying a jet of working fluid to the user' s teeth, a sensor for outputting the output signal and a control circuit. At least part of the fluid delivery system is movable relative to the handle when the device moves along the user' s teeth. Sensor for outputting the signal varies depending on the movement of the specified at least part of the fluid supply system relative to the handle. Control circuit for activating the supply of working fluid to the user' s teeth functions depending on the output signal of the sensor.EFFECT : invention widens the range of technical means for the specified purpose.36 cl, 21 dwg