electromechanical actuator has reduced space for disc brake

The invention relates to an electromechanical actuator (7) for a motor vehicle brake caliper, comprising a housing (8) having an attachment plane face (9) to a caliper body (1), this housing (7) containing a electric motor (19) and a mechanical gearbox (14) coupled to each other and comprising the components rotating about axis (AX) of normal orientation to the planar mounting surface (9). According to the invention, the reducer (14) and the motor (19) and the housing (8) extend all three entirely on the same side of the attachment side (9) planar.