An inverter case is provided on a transaxle of a vehicle so as to be inclined downward toward a vehicle front side, and the inverter case includes: a refrigerant passage connection portion provided on a front side surface of the inverter case in a longitudinal direction of the vehicle, the refrigerant passage connection portion having a shaft seal structure; a refrigerant passage member disposed on the front side surface of the inverter case and connected to the refrigerant passage connection portion by the shaft seal structure; and a projecting portion provided on an upper part of the front side surface of the inverter case, the projecting portion being configured such that a front side end of the projecting portion is placed at the vehicle front side relative to a front side end of the refrigerant passage member in the longitudinal direction of the vehicle.