Campania region has a long tradition of autochthonous cultivated sweet cherries, which constitute a very rich germplasm resource. This biodiversity is highly valued for flavour, aroma and pulp texture. The interested cultivars are well known and sold in regional and local markets, but rarely outside. Genetic studies and phenotypic classifications are useful tools to increase our knowledge of such cherry cultivars and to disseminate their particular characteristics outside the region. The aim of the present study was the molecular characterization of ten autochthonous cultivars of Prunus avium using 30 RAPD markers. Among all, U17 was useful for fingerprinting eight out of ten cultivars. On cvs Del Monte, Della Recca, Pagliaccio, Montenero, Nera Dura, Mulegnana Nera, Passaguai and Malizia, unique molecular profiles were obtained. Furthermore, it was possible to distinguish between two most important cultivars on the Campanian market (cvs Del Monte and Della Recca) with HAP18 marker. The results obtained in this study confirmed the power of RAPD markers to easily analyse genetic diversity and to find new molecular profiles in a very short time. Moreover, confidential bands, characteristics of Campania native cultivars, can be used for genotype identification.Keywords: Prunus avium; RAPD; genetic diversity; fingerprinting; biodiversity The native sweet cherry, Prunus avium L., is one of the most highly-prized fruit crops in Italy. Campania region has an interesting and rich germplasm of this fruit. Indeed, cherry growers in Campania have an increasing interest in exploiting and preserving local cultivars. This rich genetic resource is defined by particular fruit characteristics, like flavour, aroma and pulp texture, which are appreciated by local and national consumers. To enhance our knowledge about these cultivars, diversity studies with phenotypic or/and genetic characterization are needed. The first straightforward criterion to measure diversity is based on phenotypic analysis for traits of interest. Despite its limitations, elaborate and time-consuming, this method has been used for long time to identify genotypes and to design breeding schemes. The counterpart of phenotyping is genotyping. DNAbased molecular markers can overcome many of the limitations of phenotypic-based tools and provide a more direct measure of genetic diversity. Molecular markers development and use in Prunus species has been more active in peach (P. persica) than cherry (P. avium) due to its relatively short juvenile period and commercial importance (Struss et al. 2003). Among the narrow amount of molecular techniques already available in cherry, randomly amplified polymorphic DNA (RAPD) markers have proven to be a reliable marker system for genetic fingerprinting and also in determining the genetic relationships among germplasm collections. RAPD have the advantage of being simple, able to detect relatively small amounts of genetic variation and do not need prior information on the genome 114