Heat exchanger, in particular charge-air / coolant cooler

The invention relates to a heat exchanger, in particular charge-air / coolant cooler (1), the disc-type having a plurality of discs (2), wherein two adjacent plates (2) define a space which is flowed through by a heat transfer medium, and one each for the discs (2) the common heat transfer medium inlet (9) and heat transfer medium outlet (11), wherein at least two heat transfer medium channels (5, 6) per heat transfer medium inlet and / or outlet (9 or 11) are provided ,