To provide a single-phase motor having a small cogging torque.

The motor 10 includes a wholly cylindrical magnet 11, a back yoke 21 disposed at an outer peripheral side of the magnet 11, a core 31 disposed at an inner peripheral side of the magnet 11, and a shaft 41 for supporting the magnet 11 and the back yoke 21. In the magnet 11, six tile-like magnet pieces 12 are disposed circumferentially and regularly at a prescribed gap 14. Each of the six magnet pieces 12 is radially magnetized in two poles along a circumferential direction. Also, teeth 34 whose quantity equals the number of magnetizations of the magnet 11 are formed in the core 31, and single-phase winding is wound.