Oven for cooking foods, which comprises a containment body (5) which defines a heating chamber (6) and is provided with a rear wall (7), at least one fan (9), a dividing separator (8) to separate a cooking space (12) from a ventilation space (11); the dividing separator (8) is provided with at least one suction opening (10), through which the fan (9) suctions the internal air flow from the cooking space (12). The ventilation space (11) comprises a suction partition (13) and a delivery partition (14), which is under pressure, receiving the internal air flow forced by the fan (9). The oven also comprises drying means (15) for drying the air inside the heating chamber (6), comprising at least one supply duct (16) for an external air flow, placed in fluid communication with the heating chamber (6) by means of a first opening (17), evacuation means (18) for evacuating said internal air flow, comprising at least one evacuation duct (19) placed in fluid communication with the heating chamber (6) by means of a second opening (20). The first opening (17) and the second opening (20) are both made on the rear wall (7) of the containment chamber (5) at the suction zone (13) of the ventilation space (11). The said supply duct (16) crosses said ventilation space (11) and terminates with a third opening (30) made on said dividing separator (8); and the evacuation duct (19) crosses said ventilation space (11) and terminates with a fourth opening (31) made on said dividing separator (8).
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