Abstract: An oven includes a baking chamber defined by the inner case. The two storied upper and lower racks are provided in the baking chamber with a distance in-between. On both edges of these racks the rear end part of a U-letter shaped supporting member is fixed respectively, with the tips of said supporting members penetrating through a long hole formed horizontally at a predetermined height on the inner case. Consequently, both upper and lower racks are respectively so constructed as to move horizontally in the baking chamber. On each of both outer sides of the inner case a connecting rod is provided which is pivotally sustained at its upper end so that it can be turned round. This connecting rod is connected with the tips of the supporting member, and at its lower end it is connected through an arm with the door which pivotally opens and closes at its lower end line. By opening the door, therefore, both upper and lower racks are withdrawn forward to the opening side of the oven.