Arcbaeolacerta bedriagae is a polytypic species endemie to Corsica and Sardinia II represents one of the most peculiar elements of the Italian herpetofauna. This species has a fragmented range in Sardinia. The aim of this paper is to summarise the knowledge on the distribution of this lizard in Sardinia, based both on literature and original records, and to define the conservation status of its populations This research was carried out throughout the entire Sardinian territory, from June 2000 to September 2002. Most of the known sites of occurrence of A. bedriagae were checked, characterised from geomorphologic and florofaunistic points of view and gco-referenced. The surveys carried out explored only the potentially suitable habitats in different hours of the day. Three new localities were discovered, 10 checked sites were confirmed, 12 localities were not confirmed and 43 previously quoted sites were not explored. Two sampling sites were selected for a population study. In the latter two localities, several population parameters, such as density and sex ratio were studied. In the mountain site, a population density twenty limes higher than that found at the sea level site was estimated. Only five species were found to be syntopic with A. bedriagae, Podarcis tiliguerta, Algyroides fitzingeri, Tarentola mauritanica, Chalcides ocellatus and Coluber viridiflavus. The Sardinian subrange includes seven main areas of certain presence, but an underestimation due to their elusivity and the low density of some populations is possible The species generally inhabits areas of scarce interest and difficult for man to reach, though at least in some localities it seems to be disturbed by an increase in tourism. Some conservation actions were proposed.