A charging control device includes a power drive unit (PDU) for performing a drive control of a motor and a charging control of a battery, a first converter which sets an input voltage from a charger to a charge voltage for the battery, a second converter which sets an output voltage of the first converter to a drive voltage for the PDU, and a charging coupler for connecting the charger with a power supply device. The charger outputs a charge voltage in response to the detection of the connection of the coupler based on an identification voltage applied to the charging coupler. The charger is subjected to a constant voltage control, and an output voltage is set at the maximum output current or above. The PDU monitors the output voltage of the charger, and controls a charge current such that the output voltage is maintained at a constant voltage.