A wind power generator. The wind power generator includes a generator main body formed of fiberglass reinforced plastics (FRP). Built-in fans having blades are connected to four built-in fan motors to generate high pressure air to be ejected to the exterior so that an inductor including magnets is primarily and relatively rotated with respect to a rotor including a rotating shaft to induce electromotive force. In addition, high air (reproduced energy) discharged to the exterior from the built-in fans is acted on the propeller installed behind the rotor including the shaft to rotate the rotor in a reverse direction of the rotational direction of the generator main body, thereby maximizing electromotive force of energy.