To shorten a time required for charging, reduce the number of charging times while elongating running distance per one charging in order to generate during running or compensate charging or used power in arranging a wind power generation device on an electric vehicle.

An inlet for wind is widely formed, while a blade portion 2 of a fan of a generator 3 is formed to be narrow, for intensifying blowing wind force. The fan blade 2 is thus rotated for power generation. A wind power generation device may be arranged on a front grille of an electric vehicle preferably. In other cases, it may be arranged on a rear trunk, a roof, or in a space of a car. When difficulty occurs, the generator 3 can be arranged transversely. The wind power generation device can be mounted on a completely finished electric vehicle.