The subject of this paper is the importance of preventive and social medicine in medical education; it presents a study based on an examination of the function of these subjects with particular reference to the Luís Razetti School of Medicine. The authors assert that, in the present state of medical education, the new physician is unprepared to deal with the country's real needs. The purposes of the medical school are to turn out personnel who can mesh effectively into the operations of health systems, to do research and identify health problems of the community, to participate in the framing of health policies, and to train teaching staff who are socially aware and thus in tune with the country's health policies. Despite much discussion and study of the subject, little has been done in practice. The authors state their views and assert that the universities must draw up the curricula for their medical schools with an eye to the needs of the countries and with emphasis on preventive and social medicine.