A straddle-type electric vehicle (e.g., electric motorcycle 1) comprising a driving motor and an electric power control unit for controlling electric power supplied from batteries to the driving motor, a case of the electric power control unit is mounted from a location outward of the battery box, and electrode terminals protruding outward from the case are inserted into insertion holes of the battery box. The electrode terminals protruding into inside of the battery box are connected to electrodes of the batteries via electric conductors such as bus bars. In this structure, electric connecting work between the batteries and the electric power control unit can be easily carried out, high-voltage lines can be minimized in length, and the high-voltage lines are not exposed to the outside.