A ventilation device includes at least one aerator having a channel capable of conveying an air flow from an inlet opening to an outlet opening, a hollow air guiding core housed in the channel and defining two air guiding surfaces delimiting, with this channel, two flow paths capable of transporting, respectively, to the outlet opening, first and second quantities of air from the inlet opening, a fin mounted so as to be able to pivot upstream from the core and arranged so as to make it possible to adjust the ratio between the first and second quantities of air, depending on the position of same, and a control module incorporated at least partially into the core of at least the aerator and having a control panel constituted at least partially by a downstream end wall of the core and being provided with a control device.