The invention relates to a linear ultrasound piezoelectric motor comprising a mobile element (4) that is in frictional contact with a rectangular resonance plate (11). The frictional surface (18) is embodied by means of at least one of the longitudinal narrow sides of the resonance plate. Said piezoelectric motor also comprises electrodes (7) which are used to generate acoustic vibrations, and are arranged on the longitudinal wide sides of the resonance plate. According to the invention, the generator for producing acoustic vibrations is asymmetrically arranged in relation to a plane which symmetrically cross-cuts the resonance plate, and comprises two opposing electrodes generating a stationary asymmetrical space wave when excited.
