PURPOSE: A motor is provided to prevent a whirl phenomenon by installing a magnetic member for producing preliminary pressure in a thin motor. CONSTITUTION: A rotor(10) is supported by a stator(20) to rotate. A magnetism member(30) is installed on one side of a rotor and faces a stator magnetic body(22). The magnetism member is symmetrically formed and centered on a rotary shaft(12) of the rotor. The stator comprises a stator core which is arranged to oppose the magnetic member.
