Abstract: An egg incubator comprises on a front face, at least one door for the introduction thereinto of carriages with drawers containing eggs. Directing-distributing means direct a principal flow of stirring air towards said front face through which at least three series of carriages, of which one is a central series, are introduced into the incubator, and distribute by division, a part of said principal flow onto the series of carriages arranged on both sides of said central series of carriages. Moist air distributing means are constituted by a sort of inverted U whose downwardly directed arms are beneath the flow of stirring air, on the return of the latter, so that said moist air emerging from slots formed in said arms is drawn along by this return flow. It includes a vertical bank of ventilators, and a fresh air intake and temperature regulating unit associated with said vertical bank.