The aim of this study was to try to determine the hospital admission profiles of Spanish immigrants in France and whether differences exist between the admission patterns in this population and the autochtonous French population. The study was carried out between 1984 and 1985 in all the hospitals of the <<Assistance Publique-Hopitaux de Paris>>. In-patients were codified by using the OTARIE system (Organisation du Traitement Automatise de Recherche Interessant l'Epidemiologie) based on the I. C. D. 9R. (International Classification of Diseases). Observation of the proportional morbidity rates and the standardized rates showed differences between the two populations for tuberculosis, congenital pathology, poisoning and symptoms (multi-etiological processes, poorly defined conditions and symptoms <<per se>>). The Spanish sample showed a greater diagnosis for tuberculosis and symptoms (psychiatric and neurological) than the French population. However, poisoning and congenital pathologies were more frequent in the latter.