PURPOSE: An ultrasound motor is provided to obtain accurate and superior power by fixing the outer frame of a stator with a slit to a motor housing. CONSTITUTION: A motor housing(110) is divided into an upper housing(110a) and a lower housing(110b). A rotary shaft(120) passes through the center part of the motor housing in a vertical direction. A stator(130) is fixed at inside of the motor housing. The rotary shaft passes through the center part of the stator. A piezoelectric element(140) is bonded with the lower side of the stator. The piezoelectric element generates bending vibrations to the stator in a pre-set direction under the application of a pre-set voltage. A rotor(150) is installed adjacent to the upper side of the stator. The center part of the rotor is fixed to the rotary shaft.
