Aim of this research was to establish possible differences in sexual self-perception among acute and chronic schizophrenic patients, taking into consideration their hereditary predisposition.Two groups of schizophrenic patients were analyzed, consisting of 100 acute and 100 chronic schizophrenic patients, treated at the Psychiatric clinic Rijeka, in the period 1998-1999, taking into consideration their hereditary predisposition and influence of that predisposition on seven aspects of sexual self-perception: sexual self-scheme, sexual consciousness, readiness for sexual action sexual adventurism, level of negative emotions towards one's sexuality, perception of one's sexual self-competence, sexual satisfaction.Results show that hereditary predisposition in chronic schizophrenic patients has a negative effect on some of the aspects of sexual self-perception: sexual self-scheme and sexual satisfaction. Therefore, patients with hereditary predisposition achieve lower results than those without hereditary predisposition.We can conclude that hereditary predisposition negatively influences certain aspects of sexual self-perception in chronic schizophrenic patients, and that it does not influence aspects of sexual self-perception in acute schizophrenic patients.