A vehicle air-conditioning apparatus comprising: a condenser unit that is attachable to a roof of a vehicle; a first evaporator unit that is attachable to the roof; and a second evaporator unit that is attachable to the roof and arranged adjacent to the first evaporator unit in a width direction of the vehicle, wherein the condenser unit has a condensing portion (166, 167, 168, 181) that condenses a refrigerant, compressed by a compressor, by exchanging heat between the refrigerant and outside air, wherein the condenser unit is located between the first evaporator unit and the second evaporator unit in the width direction, characterized in that the condenser unit comprises at least one subcooling portion (169, 182) that cools a liquid-phase refrigerant, condensed by the condensing portion (166, 167, 168, 181), by exchanging heat between the liquid-phase refrigerant and the outside air, each of the first evaporator unit and the second evaporator unit evaporates a decompressed refrigerant, flowing out of the at least one subcooling portion (169, 182) and being decompressed, by exchanging heat between the decompressed refrigerant and air to be blown into a vehicle compartment, one subcooling portion of the at least one subcooling portion (169, 182) is located at a position displaced forward in a traveling direction of the vehicle in the condenser unit; the condenser unit has a first heat radiating heat exchanger and a second heat radiating heat exchanger, the first heat radiating heat exchanger condenses the refrigerant, compressed by the compressor, by exchanging heat between the refrigerant and the outside air, the second heat radiating heat exchanger has the condensing portion and the one subcooling portion, each of the first evaporator unit and the second evaporator unit evaporates the decompressed refrigerant, flowing out of the one subcooling portion and being decompressed, by exchanging heat between the decompressed refrigerant and the air to be blown into the vehicle compartment, the second heat radiating heat exchanger is located on a front side of the first heat radiating heat exchanger in a traveling direction of the vehicle; wherein the first heat radiating heat exchanger is connected to the condensing portion in series, and is located upstream of the condensing portion in a flow direction of the refrigerant flowing from the compressor to one of the first evaporator unit and the second evaporator unit, and an entirety of the refrigerant flowing out of the first heat radiating heat exchanger flows into the condensing portion. a condenser unit that is attachable to a roof of a vehicle; a first evaporator unit that is attachable to the roof; and a second evaporator unit that is attachable to the roof and arranged adjacent to the first evaporator unit in a width direction of the vehicle, wherein the condenser unit has a condensing portion (166, 167, 168, 181) that condenses a refrigerant, compressed by a compressor, by exchanging heat between the refrigerant and outside air, wherein the condenser unit is located between the first evaporator unit and the second evaporator unit in the width direction, characterized in that the condenser unit comprises at least one subcooling portion (169, 182) that cools a liquid-phase refrigerant, condensed by the condensing portion (166, 167, 168, 181), by exchanging heat between the liquid-phase refrigerant and the outside air, each of the first evaporator unit and the second evaporator unit evaporates a decompressed refrigerant, flowing out of the at least one subcooling portion (169, 182) and being decompressed, by exchanging heat between the decompressed refrigerant and air to be blown into a vehicle compartment, one subcooling portion of the at least one subcooling portion (169, 182) is located at a position displaced forward in a traveling direction of the vehicle in the condenser unit; the condenser unit has a first heat radiating heat exchanger and a second heat radiating heat exchanger, the first heat radiating heat exchanger condenses the refrigerant, compressed by the compressor, by exchanging heat between the refrigerant and the outside air, the second heat radiating heat exchanger has the condensing portion and the one subcooling portion, each of the first evaporator unit and the second evaporator unit evaporates the decompressed refrigerant, flowing out of the one subcooling portion and being decompressed, by exchanging heat between the decompressed refrigerant and the air to be blown into the vehicle compartment, the second heat radiating heat exchanger is located on a front side of the first heat radiating heat exchanger in a traveling direction of the vehicle; wherein the first heat radiating heat exchanger is connected to the condensing portion in series, and is located upstream of the condensing portion in a flow direction of the refrigerant flowing from the compressor to one of the first evaporator unit and the second evaporator unit, and an entirety of the refrigerant flowing out of the first heat radiating heat exchanger flows into the condensing portion.