The invention relates to a motor-driven centrifugal pump comprising a can or sleeve surrounding the rotor motor, in which can or sleeve a bearing support is provided on the motor shaft between the motor rotor and the pump impeller. Said bearing support comprises a radial bearing which carries the motor shaft and the one-piece bearing support has a washer-type shaft seal on the side facing the pump impeller, said seal being overmoulded with the material of the bearing support.