To prevent occurrence of swing and noise generated on a rotor for the long life of the rotor, by forming the diameter of a permanent magnet so as to become the same as that of a ballance piece, and forming the permanent magnet and balance piece so as to attract each other correspondingly with a constant distance between them kept.

A stator 3 is connected to a balance piece 2, and fixed to a corresponding stationary object by the shaft tube 31 of the stator 3. The stator 3 is pivoted to the shaft 41 of a rotor 4 through a rotational member 32, the permanent magnet 44 of the rotor 4 is formed so as to meet the balance piece 2, and the rotor 4 is controlled by a circuit plate in common use and a controlling element such as a hall induction element, so that the rotor 4 is started up and rotated. It is thus possible to provide the rotor 4 for stable rotation by the balanced attraction formed by the permanent magnet 44 and the balance piece 2, and long life of the motor because of no swing or noise during rotating.