The present invention relates to an air conditioner for a vehicle which includes an integrated heat pump system having an electronic part waste heat recovery device to enhance heating performance and which can cool a battery of an electric vehicle using refrigerant in a cooling mode. The air conditioner for a vehicle includes a refrigerant circulation system for performing cooling or heating of the interior of the vehicle by circulating refrigerant. The air conditioner further includes a first refrigerant pipe exchanging heat with a battery system of the vehicle in sequence to selectively exchange heat between refrigerant of the refrigerant circulation system and a coolant of the first coolant pipe.