A battery is disposed close to a through-hole of a swing shaft that pivotally supports a swing arm on a vehicle body frame so as to be freely swingable at a position closer to the front of the vehicle body in the swing arm. An electric motor is disposed close to an axle of a rear wheel at a position closer to the rear of the vehicle body in the swing arm. The control board is disposed at a position outside of the battery in the vehicle width direction, and the heating element board is disposed at a position rearward of the vehicle body with respect to the control board and forward of the vehicle body with respect to the motor.