A mounting device for mounting functional devices within a cargo hold of an aircraft. The mounting device includes at least one surface unit and a plurality of functional devices which can be mounted on the surface unit in such a way that the surface unit can be inserted together with functional devices mounted thereon into the aircraft cargo hold in the manner of a template in such a way that all the functional devices come to lie in defined mounting locations in the cargo hold and can be mounted on supporting structures of the aircraft or the cargo hold without adjustment in relation to the surface unit.