PURPOSE: To eliminate the necessity for forming the load side bracket of an electric motor and simplify construction of a pump, by supporting a load side bearing of a motor shaft with the outside end of a pump casing surrounding a pump impeller and driven permanent magnet.

CONSTITUTION: An electric motor is operated, if a motor shaft 4 is rotated, a magnet holder 7 and driving permanent magnet 8 are rotated. Simultaneously, a driven permanent magnet 10F, magnetically coupled to the driving permanent magnet 8, is rotated to rotate a pump impellr 10B, in this way, a pump 10 performs its pumping action. In this constitution, a casing 10Aa, supporting a load side bearing 9 of the electric motor, can eliminate the necessity for providing a load side bracket of the motor.