Cooking oven muffle (2, 64) with an opening plane and with a plurality of holding devices (26, 118) which are arranged on one or more planes and are designed - to be able in each case to exchangeably receive a plurality of exchangeable trays of food for cooking on a plurality of planes at their rear regions facing towards the muffle rear wall, - wherein the cooking oven muffle (2, 64) has first and second guides, wherein the first guides are assigned to opposite walls and/or to the ceiling and/or to the floor of the cooking oven muffle (2, 64), wherein the trays of food for cooking are movable substantially horizontally by means of said first and second guides between a rear position, in which the trays of food for cooking are located in a cooking region, and a front position, in which the trays of food for cooking are located in an exchange region, - wherein the holding devices (26, 118) are designed in such a manner that the trays of food for cooking can be exchangeably received at their rear region facing towards the rear wall from the rear and/or from the sides and can be grasped by the user not only from the front, but also from the sides and can be suspended in the holding device (26, 118), - wherein the first guides are guided on the second guides which, for their part, are arranged indirectly on the walls and/or the floor and/or the ceiling of the cooking oven muffle (2, 64) fixedly or so as to be releasable by a user, wherein the second guides are arranged on one or more supports (14, 66, 112) fixedly or so as to be releasable by a user, which supports, for their part, are arranged on the walls and/or the floor and/or the ceiling of the cooking oven muffle (2, 64) fixedly or so as to be releasable by a user, characterized in that the cooking region extends entirely behind the loading opening of the cooking oven muffle (2, 64) and the exchange region extends entirely in front of the loading opening of the cooking oven muffle (2, 64), and wherein the holding devices (26, 118) are located entirely in front of the opening plane of the cooking oven muffle (2, 64) or, and wherein in each case a first and a second guide form a double pull-out guide, the first guides are formed as pull-out guides which each have two rails (22, 24 or 60, 62), which are movable relative to one another, in order to receive the holding devices movably or immovably at or on the movable rail (24 or 62), and the second guides are designed as pull-out guides which each have two rails (18, 20) which are movable relative to each other. - to be able in each case to exchangeably receive a plurality of exchangeable trays of food for cooking on a plurality of planes at their rear regions facing towards the muffle rear wall, - wherein the cooking oven muffle (2, 64) has first and second guides, wherein the first guides are assigned to opposite walls and/or to the ceiling and/or to the floor of the cooking oven muffle (2, 64), wherein the trays of food for cooking are movable substantially horizontally by means of said first and second guides between a rear position, in which the trays of food for cooking are located in a cooking region, and a front position, in which the trays of food for cooking are located in an exchange region, - wherein the holding devices (26, 118) are designed in such a manner that the trays of food for cooking can be exchangeably received at their rear region facing towards the rear wall from the rear and/or from the sides and can be grasped by the user not only from the front, but also from the sides and can be suspended in the holding device (26, 118), - wherein the first guides are guided on the second guides which, for their part, are arranged indirectly on the walls and/or the floor and/or the ceiling of the cooking oven muffle (2, 64) fixedly or so as to be releasable by a user, wherein the second guides are arranged on one or more supports (14, 66, 112) fixedly or so as to be releasable by a user, which supports, for their part, are arranged on the walls and/or the floor and/or the ceiling of the cooking oven muffle (2, 64) fixedly or so as to be releasable by a user, characterized in that the cooking region extends entirely behind the loading opening of the cooking oven muffle (2, 64) and the exchange region extends entirely in front of the loading opening of the cooking oven muffle (2, 64), and wherein the holding devices (26, 118) are located entirely in front of the opening plane of the cooking oven muffle (2, 64) or, and wherein in each case a first and a second guide form a double pull-out guide, the first guides are formed as pull-out guides which each have two rails (22, 24 or 60, 62), which are movable relative to one another, in order to receive the holding devices movably or immovably at or on the movable rail (24 or 62), and the second guides are designed as pull-out guides which each have two rails (18, 20) which are movable relative to each other.