The invention relates to an ultrasonic motor, comprising a large number of plate-shaped piezoelectric ultrasonic actuators (10), each having at least one friction element (18) arranged thereon, wherein an element (1) to be driven is associated with in each case one ultrasonic actuator or in each case one pair of ultrasonic actuators, and the ultrasonic motor furthermore has a housing and an electrical exciter device. According to the invention, the elements to be driven are moveable independently of one another, and each ultrasonic actuator or each ultrasonic actuator pair is arranged in a holder (2), wherein the holders are pressed against one another by means of housing side covers (3), and the friction elements of the ultrasonic actuators are pressed against a friction layer (50) of the corresponding element to be driven by means of an elastic interlayer (5), which is in contact with those peripheral faces of the ultrasonic actuators which are arranged opposite the friction elements, with the result that, overall, a cassette-like ultrasonic motor stack is produced.