Abstract: In a condenser for a vehicle air-conditioning system having a pipe-rib block (10) provided on both sides with collecting pipes (13, 14) which are divided by means of partitions (17, 18) into an upper condensing portion for gaseous refrigerant and a lower supercooling portion for liquid refrigerant, there is disposed parallel to a collecting pipe (14) a collector (23), which is connected by a first connecting opening (24) to the condensing portion and by a second connecting opening (25) to the supercooling portion.