Abstract: The invention relates to an ultrasound device comprising a piezo element (4), which generates ultrasound waves, and intermediate elements (5, 6) via which the ultrasound waves are transmitted to the probes (7) and into a sample volume inside a microplate (1). A piezo element (4) comprises a number of probes (7), which radiate the ultrasound and which are arranged next to one another in a row. Between the point of origin of the sound wave on the piezo element (4) and the point of output of the sound wave on the radiating probes (7), the wave-transmitting elements (5, 16) do not widen at all with regard to the surface of the piezo element (4).