To provide an environment improvement effect by providing a power generating function to an exercise bike of a health appliance widely prevailing in homes and companies without modification, changing a kinetic energy produced from a human body into a clean electric energy, and effectively using the generating function of the exercise bike by many people.

This man-driven generator comprises a power transmission pedal 2, a receiving fitting 3 for the power transmission pedal, and a pipe 8 for connection. Since the exercise bike can be connected to a generator, the power generating function can be provided to the conventional exercise bike.