The invention relates to a stacked-plate heat exchanger, in particular a charge-air cooler, having a plurality of elongate plates (1-3;21-23;51-53) which are stacked on top of one another and are connected, in particular soldered, to one another, which plates (1-3;21-23;51-53) delimit a cavity (55-57) for conducting a medium to be cooled, for example charge air, in the longitudinal direction of the plates, and a further cavity (63-65) for conducting a coolant, wherein the plates (1-3;21-23;51-53) have in each case one inlet port and one outlet port for the medium which is to be cooled. In order to provide a stacked-plate heat exchanger which can be produced cost-effectively and has a long service life even at high temperatures, according to the invention, at least one coolant port (14-16) extends partially around a port (12) for the medium to be cooled.