Invention, the at least one ultrasonic wave to the screen frame (11, 21, 31, 41), a screen frame (11, 21, 31, 41) the screen fabric arranged in the (12, 22, 32, 42), the generation of ultrasonic vibrations converter (15, 25, 35, 45), and an ultrasonic transducer (15, 25, 35, 45) and the sound waves, at least one for introducing ultrasonic vibrations into conductive connection, the screen cloth (12, 22, 32, 42) introducing ultrasonic vibrations into the means (13, 23, 33a, 33b, 43a, 43b) a device (10, 20, 30, 40) for ultrasound screening having a screen fabric (12, 22, 32, 42) of the means (13, 23, 33a, 33b, 43a, 43b) in the screen cloth (12, 22, 32, 42) screen fabric formed to introduce the ultrasonic vibrations into the (12, 22, 32, 42) by which the position of the , changed by the movement of the screen fabric (12, 22, 32, 42) the screen cloth (12, 22, 32, 42) means (13, 23, 33a, 33b, 43a, 43b) for introducing ultrasonic vibrations into the for to be, the screen cloth (12, 22, 32, 42) with at least one means (ultrasonic screening 13, 23, 33a, 33b, 43a, 43b) is arranged to be movable with respect to the screen fabric (12, 22, 32, 42) for introducing ultrasonic vibrations a for relates to a device (10, 20, 30, 40), a screen frame (11, 21, 31, 41), a screen frame (11, 21, 31, 41) the screen cloth (12, 22, 32 arranged in , 42), at least one ultrasonic transducer (15, 25, 35, 45a, 45b), and an ultrasonic transducer (15, 25, 35, 45a, 45b) and the sound wave for generating ultrasonic vibration, which is conductive connection screen fabric at least one means (13, 23, 33a, 33b, 43a, 43b) apparatus (10, 20, 30, 40) having an, at least temporarily for introducing ultrasonic vibrations into the (12, 22, 32, 42) by being arranged in the flow of the material to be screened in the screening process, the fabric by a screen means (13, 23, 33a, 33b, 43a, 43b) for introducing ultrasonic vibrations into the (12, 22, 32, 42) At least implicitly as an ultrasonic vibration to the screen fabric, the ultrasonic screening method (12, 22, 32, 42) is excited, a different position of the screen cloth (12, 22, 32, 42) in the course of the method are to be excited by ultrasonic vibration , the position of the screen fabric means (13, 23, 33a, 33b, 43a, 43b) for introducing ultrasonic vibrations into the (12, 22, 32, 42), during the method, a screen fabric (12, 22, 32, is changed with respect to 42) it relates to an ultrasonic screening method.