VEHICLE AIR-CONDITIONER

When the temperature of a device that is constituted by an electric component or an electronic component and that is arranged below a rear seat exceeds a predetermined value during air-conditioning operation in an internal-air circulation mode, an air-conditioning switching action by which a rear air-conditioning unit is switched from the internal-air circulation mode to an external-air introduction mode is performed, and thereby ventilation of the vehicle cabin is performed. Therefore, before the surrounding temperature of an occupant significantly rises due to heat generated by the device and the occupant feels uncomfortable, by restraining the surrounding temperature from rising through external-air introduction to avoid a situation in which occupant feels uncomfortable, it is possible to maintain comfortableness in the vehicle cabin.