The rockslide area “Schütt” at the southern slope of the Dobratsch (Carinthia, Austria) is one of the most biodiverse regions in Austria. The results of the present study show, that this is also true with regard to the diversity of the saproxylic beetle fauna. The main goal of this thesis was an inventory of xylobiotic beetle species (Coleoptera, Insecta) based on own extensive field surveys as well as on all available historic data sources. The own surveys were carried out in the vegetation periods of 2012/2013 in the Natura 2000 sites “Villacher Alpe (Dobratsch)“ and “Schütt-Graschelitzen“, applying qualitative and semiquantitative methods such as 15 crown eclectors, hand collecting, beating of vegetation, sweep net and sieve. In total 734 beetle species including 341 saproxylic species were recorded among 67 families. The continued existence of about 20 % of the recorded beetle fauna (35 % of all Xylobionta) is either (critically) endangered or vulnerable. Remarkable records include the critically endangered species Lacon lepidopterus (Elateridae) and Hymenorus doublieri (Tenebrionidae) as well as the longhorn beetle Acanthocinus henschi, distributed in the Eastern Mediterranean Area. The eastern pine wood stainer Gnathotrichus materiarius is herewith first recorded for Austria. The current, nationwide distribution of Rushia parreyssi (Melandryidae) or the rare buprestid Buprestis splendens, protected by the Habitats Directive, is restricted to single sites in the rockslide area. The presence of 13 “primeval forest relict species” proofed the precence of virgin forests in the Schütt. Small parts of the steep, rocky slopes remained unused by forestry, feature substantial amounts of large-dimensioned deadwood structures and function as refugia for rare, highly endangered beetle coenoses. Forestry is the biggest threat to the near-natural biotopes and their beetle fauna.