This study presents severa! analyses in micropaleontology and scdimentology of four sections of permian deposits in the Hydra Island (Grecce). The micropaleontological study is an inventory of foraminifers and aigne, which allow securnte datations to precise age assigncmcnts. Rcprcscntaûvc facies have bccn dcfined for the Permian deposits. Summary of these data pcrmitted to eharacterize successive paleocnvironments and to propose a reconstruction of Permian sequences in this arca.