Oven for cooking foods, which comprises: - a containment body, which defines a heating chamber and is provided with a rear wall; - at least one fan susceptible of rotating around a rotation axis, arranged in said heating chamber and rotatably supported by a drive shaft placed to cross said rear wall, in order to generate at least one air flow within said heating chamber; - a dividing separator, housed inside said heating chamber and facing said fan, to separate a cooking space, in which the foods to be cooked are intended to be arranged, from a ventilation space, which is defined between said dividing separator and said rear wall and in which said fan is arranged; said dividing separator being provided with at least one suction opening (10, 10'), through which said fan is adapted to suction said internal air flow from cooking space; said dividing separator also delimiting in said ventilation space: - a suction partition which is placed in a position adjoining said fan and feeds said fan with said internal air flow through said suction opening (10, 10'); - and a delivery partition, which is placed in a distal position with respect to said fan, and receives said internal air flow forced by said fan itself; - drying means associated with said heating chamber in order to dry the air inside said heating chamber, comprising at least one supply duct for supplying an external air flow, placed in fluid communication with said heating chamber by crossing a first opening made on said containment body; - evacuating means associated with said heating chamber in order to evacuate said internal air flow, comprising at least one evacuation duct placed in fluid communication with said heating chamber by crossing a second opening made on said containment body; said oven being characterized in that: - said supply duct crosses said ventilation space and terminates with a third opening made on said dividing separator at said suction partition; - said evacuation duct crosses said ventilation space and terminates with a fourth opening made on said dividing separator at said suction partition. - a containment body, which defines a heating chamber and is provided with a rear wall; - at least one fan susceptible of rotating around a rotation axis, arranged in said heating chamber and rotatably supported by a drive shaft placed to cross said rear wall, in order to generate at least one air flow within said heating chamber; - a dividing separator, housed inside said heating chamber and facing said fan, to separate a cooking space, in which the foods to be cooked are intended to be arranged, from a ventilation space, which is defined between said dividing separator and said rear wall and in which said fan is arranged; said dividing separator being provided with at least one suction opening (10, 10'), through which said fan is adapted to suction said internal air flow from cooking space; said dividing separator also delimiting in said ventilation space: - a suction partition which is placed in a position adjoining said fan and feeds said fan with said internal air flow through said suction opening (10, 10'); - and a delivery partition, which is placed in a distal position with respect to said fan, and receives said internal air flow forced by said fan itself; - a suction partition which is placed in a position adjoining said fan and feeds said fan with said internal air flow through said suction opening (10, 10'); - and a delivery partition, which is placed in a distal position with respect to said fan, and receives said internal air flow forced by said fan itself; - drying means associated with said heating chamber in order to dry the air inside said heating chamber, comprising at least one supply duct for supplying an external air flow, placed in fluid communication with said heating chamber by crossing a first opening made on said containment body; - evacuating means associated with said heating chamber in order to evacuate said internal air flow, comprising at least one evacuation duct placed in fluid communication with said heating chamber by crossing a second opening made on said containment body; - said supply duct crosses said ventilation space and terminates with a third opening made on said dividing separator at said suction partition; - said evacuation duct crosses said ventilation space and terminates with a fourth opening made on said dividing separator at said suction partition.