Heat exchanger

A heat exchanger for thermal exchange between at least two separate media comprising:

• a plurality of plates stacked on one another, with first areas which are spaced apart from one another and second areas which are in contact with one another to form respective first and second flow paths between respectively adjacent plates in a generally planar heat exchange region, wherein each of the plates comprises a plurality of outer regions each containing an aperture adjacent to the heat exchange region, and the plates are spaced apart from one another by means of shaped-out portions of the plates, and wherein outer regions, which succeed one another about the circumference of the plates and which contain the apertures, are alternately shaped-out in opposite directions from the plane of the heat exchange region.