To attain a high output by reducing the rotational resistance of a generator as much as possible and to storage power being generated constantly when a person is traveling by bicycle.

Since driving resistance of the generator is reduced using an AC three-phase permanent magnet generator contained in a generator case coupled with the rim of the bicycle through a plurality of spokes, fatigue is lessened when a person is traveling by bicycle. Furthermore, power being generated constantly when a person is traveling by bicycle can be stored effectively and utilized for many purposes because AC power can be converted into DC power and stored readily in a secondary battery.