A condenser for use in a vehicle (A1) comprises, in an integrated manner, a condensation part (4), which cools a coolant that is discharged, at a high temperature and a high pressure, to the condensation part (4) from a compressor (1) of a refrigeration cycle, by radiating heat from the coolant by way of a heat exchange between the coolant and the external atmosphere, a reservoir tank (5) that stores the coolant that has been liquefied by the condensation part (4), and a supercooling part (6), which cools the liquid coolant that is discharged to the supercooling part (6) from the reservoir tank (5) at high pressure. The supercooling part (6) is configured to cool the liquid coolant that is discharged to the supercooling part (6) from the reservoir tank (5) at a high pressure by way of a heat exchange, which does not employ a radiator fin, between the high pressure liquid coolant and a low pressure coolant that is discharged from an evaporator (3) of the refrigeration cycle.