From 1938 to 1941 he studied at the Classical Lyceum Umberto I of Naples, but in 1941 his family moved to Padova and he was graduated to the lyceum Titus Livius. In 1942, he matriculated at the University of Naples Federico II, studying law. During this period, Napolitano adhered to the local University Fascist Youth ("Gioventù Universitaria Fascista"), where he met his core group of friends, who shared his opposition to Italian fascism. As he would later state, the group "was in fact a true breeding ground of anti-fascist intellectual energies, disguised and to a certain extent tolerated".