Disclosed is a magnetorheological clutch comprising a stationary part (1), a rotating primary part (2) with primary lamellae (7), and a coaxially rotating secondary part (3) with secondary lamellae (20). An adjustable magnetic field acts upon the magnetorheological fluid. In order to be able to transmit the greatest possible torque in a minimum of space and at minimal power consumption, at least one magnet coil (25) encompassing a first yoke (24a, 24b) is disposed such that primary lamellae (7, 7') and secondary lamellae (20, 20') are located on both sides thereof. The lamellae are made of a material which is provided with moderate magnetic permeability and allows limited short-circuit flux. A second yoke (27, 27') having a face (32, 32') that extends parallel to the lamellae adjoins the outermost lamella on both sides, "outermost" being in relation to the axial direction.