A heat exchange module is disclosed comprising two metal sheets welded along weld lines defining between them a group of channels disposed side by side substantially in a common plane, intended to be passed through by an exchange fluid and, from the fluidic point of view, being in parallel with each other between two connection orifices of the module. The group of channels has a generally U-shape configuration, which connects together the said connection orifices that are laterally separated from each other.