An oven that comprises - a cooking chamber wherein the items to be cooked are placed, - a door for accessing the cooking chamber, - an outer panel disposed on the door, forming the surface of the door in contact with the exterior, - an inner panel forming the surface of the door in contact with the cooking chamber, and - a frame disposed between the outer panel and the inner panel, whereon the outer panel is secured on one side and the inner panel on the other side such that they are parallel to one another, the frame having a hollow and quadrangular cross-section, with two vertical profiles forming the lateral sides of the door and a horizontal profile connecting the vertical profiles to each other, constructed by joining the profiles (8 and 11) in an inverted "U" shape, characterized by - at least one frame entrance hole that is situated on the inner wall of the vertical profiles on the side facing in between the panels (4 and 5), that opens inside the door thereby allowing the air entering in between the panels (4 and 5) inside the door to pass into the frame, and - at least one discharge hole that is situated on the outer wall on the side of the vertical profile facing the outside and at least one discharge hole that is disposed on the horizontal profile on the outer wall on the side of the horizontal profile facing outside, such that the frame is used like an air channel by means of the profiles (8, 11). - a cooking chamber wherein the items to be cooked are placed, - a door for accessing the cooking chamber, - an outer panel disposed on the door, forming the surface of the door in contact with the exterior, - an inner panel forming the surface of the door in contact with the cooking chamber, and - a frame disposed between the outer panel and the inner panel, whereon the outer panel is secured on one side and the inner panel on the other side such that they are parallel to one another, the frame having a hollow and quadrangular cross-section, with two vertical profiles forming the lateral sides of the door and a horizontal profile connecting the vertical profiles to each other, constructed by joining the profiles (8 and 11) in an inverted "U" shape, characterized by - at least one frame entrance hole that is situated on the inner wall of the vertical profiles on the side facing in between the panels (4 and 5), that opens inside the door thereby allowing the air entering in between the panels (4 and 5) inside the door to pass into the frame, and - at least one discharge hole that is situated on the outer wall on the side of the vertical profile facing the outside and at least one discharge hole that is disposed on the horizontal profile on the outer wall on the side of the horizontal profile facing outside, such that the frame is used like an air channel by means of the profiles (8, 11). - at least one frame entrance hole that is situated on the inner wall of the vertical profiles on the side facing in between the panels (4 and 5), that opens inside the door thereby allowing the air entering in between the panels (4 and 5) inside the door to pass into the frame, and - at least one discharge hole that is situated on the outer wall on the side of the vertical profile facing the outside and at least one discharge hole that is disposed on the horizontal profile on the outer wall on the side of the horizontal profile facing outside, such that the frame is used like an air channel by means of the profiles (8, 11).