A switchgear cabinet with a rack and/or panel elements, wherein a mounting plate can be attached to an interior of the switchgear cabinet. A lower edge of the mounting plate has sliding elements, wherein one or several spacing elements are fastened on a rear panel element and/or on rear parts of the rack, by which the mounting plate is supported in the mounting position. The mounting plate can provide fastening receivers in the area of the lower edge and the upper edge which, in the installation position of the mounting plate, cooperate with fastening elements of the lower and upper contact elements and fix the mounting plate rigidly in place. With sliding elements supported on the bottom or the cover plate and fastening elements at the spacing elements and fastening receivers on the mounting plate, an installation without sliding rails is possible, wherein the switchgear cabinet can be installed facing the attachment area with the bottom plate or the cover plate.