The invention relates to a fixing element (33) extending as a falt particularly lamellar element along a preferred direction (34) and comprising a corrugated sheet metal core (18) as a central component and core providing the fixing element (33) with the characteristic of being integrally rigid and permanently deformable by hand and said core being covered by a cover (36 37). For such a fixing element a large range of use is achieved in that the corrugations of the corrugated core sheet(18) are oriented substantially parallel to the preferred direction (34) and that means (38 39) for relasably attaching the fixing element (33) are disposed on the fixing element (33).
