Abstract: A capacitor-operated motor having a single winding span includes a housing, a stator par, and a rotor par. The stator part is formed by stacking up a plurality of stator core plates that have a plurality of primary-phase tooth parts, secondary-phase tooth parts, and stator slots. The primary windings and the secondary windings are wound around the primary-phase tooth parts and the secondary-phase tooth parts respectively. When the current is conducted through the plurality of primary windings and the plurality of secondary windings, magnetic force is generated to rotate the rotor part. The secondary-phase tooth parts are alternately arranged with the primary-phase tooth parts with stator slot positioned in between them. The fact that the number of rotor slot is at least two times as many as that of the stator slot is capable of lowering the vibration and noise of the capacitor-operated motor having a single winding span.