An electrically driven vehicle and a notification system therefor are provided. The electrically driven vehicle includes a high-voltage battery and an inlet, a charging connector of an external power source is connected to the inlet, and power can be supplied from the external power source to the high-voltage battery. The electrically driven vehicle includes a battery heater unit heating the high-voltage battery by using power supplied from the external power source; and a charging ECU detecting an alighting preparing operation of a user, acquiring an environmental temperature at a time of detection in accordance with detection of the alighting preparing operation, and causing a meter panel to display a message prompting a driver to connect the charging connector to the inlet when the acquired environmental temperature is equal to or lower than an output decline temperature set for the high-voltage battery.