An electric generator 10 of the present invention comprises a permanent magnet 14, a coil 30, a yoke 20, and attracted means 19 composed of a plurality of attracted pieces 18 which are arranged radially around the rotation axis 12 and are magnetized by the permanent magnet 14. The permanent magnet 14, the coil 30, the yoke 20, and the attracted means 19 are mounted on the rotation axis 12 and the attracted pieces 18 that constitute the attracted means 19 are each placed in positions that correspond to positions that bisect the spaces between the metal pieces that constitute the yoke 20, so that the cogging torque exerted on the rotation axis 12 is reduced.