A vehicle air-conditioning apparatus comprising: a compressor; a first heat exchanger which is arranged in the inside of an air conditioning unit and where an amount of air supplied to the first heat exchanger is adjusted by a damper; a second heat exchanger which is arranged in the inside of the air conditioning unit, the second heat exchanger being arranged upstream of the first heat exchanger in the direction of air flow in the air conditioning unit; a vehicle exterior heat exchanger which is capable of performing a heat exchange with outside air; a first refrigerant control part which is capable of throttling a refrigerant flow path; a second refrigerant control part which is capable of throttling and closing a refrigerant flow path; a third refrigerant control part which is capable of throttling and closing a refrigerant flow path; and a fourth refrigerant control part which is capable of closing a refrigerant flow path, wherein at least the compressor, the first heat exchanger, the first refrigerant control part, the vehicle exterior heat exchanger, the second refrigerant control part and the second heat exchanger are connected in the preceding order in a loop, characterized in that it comprises a refrigerant flow path between the first heat exchanger and the first refrigerant control part and a refrigerant flow path between the second refrigerant control part and the second heat exchanger are connected with each other by a first bypass flow path provided with the third refrigerant control part, and a refrigerant flow path between the vehicle exterior heat exchanger and the second refrigerant control part and a refrigerant flow path between the second heat exchanger and the compressor are connected with each other by a second bypass flow path provided with the fourth refrigerant control part. a compressor; a first heat exchanger which is arranged in the inside of an air conditioning unit and where an amount of air supplied to the first heat exchanger is adjusted by a damper; a second heat exchanger which is arranged in the inside of the air conditioning unit, the second heat exchanger being arranged upstream of the first heat exchanger in the direction of air flow in the air conditioning unit; a vehicle exterior heat exchanger which is capable of performing a heat exchange with outside air; a first refrigerant control part which is capable of throttling a refrigerant flow path; a second refrigerant control part which is capable of throttling and closing a refrigerant flow path; a third refrigerant control part which is capable of throttling and closing a refrigerant flow path; and a fourth refrigerant control part which is capable of closing a refrigerant flow path, wherein at least the compressor, the first heat exchanger, the first refrigerant control part, the vehicle exterior heat exchanger, the second refrigerant control part and the second heat exchanger are connected in the preceding order in a loop, characterized in that it comprises a refrigerant flow path between the first heat exchanger and the first refrigerant control part and a refrigerant flow path between the second refrigerant control part and the second heat exchanger are connected with each other by a first bypass flow path provided with the third refrigerant control part, and a refrigerant flow path between the vehicle exterior heat exchanger and the second refrigerant control part and a refrigerant flow path between the second heat exchanger and the compressor are connected with each other by a second bypass flow path provided with the fourth refrigerant control part.