To prevent starting of an engine from being unexpected by a driver.

When power is supplied from a battery 50 to external equipment since the external equipment is connected to a receptacle 52 connected to a battery 50, an arrow G between the battery 50 and the receptacle 52 is displayed. By this display, the state can be notified to the driver. As a result, even when the engine 22 is started to charge the battery 50 since remaining capacity of the battery 50 is lowered by the power supply while an operation of the engine 22 is stopped, the starting can be prevented from being the one unexpected by the driver.