The invention relates to a motor-pump assembly (1), in particular for providing pressure for a brake actuating device of a motor vehicle brake system, having a pneumatic brake booster, in particular a vacuum brake booster, comprising a pump (2) and an electric motor (3) which drives the pump (2), wherein the pump (2) is provided as a double-diaphragm pump with two opposite working diaphragms (4), wherein outlet ducts are provided in working chamber covers (6) and in the pump housing (5) in such a way that air which is displaced out of working chambers (7) is conducted into an inner chamber (22), which surrounds a crank drive (8), of the pump housing (5), and that an air outlet unit (13) is provided which enables the air to be blown out of the inner chamber (22) in a quiet fashion by deflecting the air. To provide a quiet, reduced-cost motor-pump assembly which requires reduced assembly expenditure in comparison with the known generic unit, it is proposed according to the invention that the eccentrics (9) have in each case one balancing weight (25) which is integrally formed on the eccentric (9).