<p>The ultrasonic motor is equipped with a vibrating body (12) in which a piezoelectric element (12a) vibrates at a high frequency, and a moving body which is brought into pressure contact with the vibrating body (12) and is moved by the aforementioned high-frequency vibration. The shape of the contact part (12d) of the vibrating body (12) that contacts the moving body is formed to be longer in the direction to intersect the direction the moving body moves than the length in the direction the moving body moves. With the ultrasonic motor that has such a construction, the vibrating body (12) and the moving body are brought into linear contact by the contact part (12d), so deformation and abrasion of the contact part can be limited by a reduction in the contact stress caused by increased contact area, and the transmission of torque can be improved while detection sensitivity and resolution are maintained.</p>
