A fitness power generation bicycle includes: a bicycle gymnastic device, comprising a main frame and a drive sprocket pin-jointed with the main frame; a generator located on the main frame, comprising a shaft and a driven sprocket fixed on the shaft; a chain connecting the drive sprocket with the driven sprocket; a battery electrically connected with the generator for storing an electric energy from the generator; and an inverter electrically connected with the battery for adjusting an output current of the battery. The above-mentioned fitness power generation bicycle combines the fitness with power generation, which not only makes the user take exercise, but also stores the energy from the exercise, thereby achieving the environmental protection.