A circuit box is to accommodate a circuit board that has a terminal stand for external wire connection and the circuit box includes a basal wall that has a mount face of which the circuit box is mounted, a side wall that is connected to a periphery of the basal wall and has a wire service entrance, a circuit-board support wall that is located apart from the basal wall and supports the circuit board, and a wire mount stand that has a wire support wall that extends from the wire service entrance in the side wall toward the circuit-board support wall and inclines away from the basal wall.