During recent 20 years (1946--1966) in Leningrad City the incidence of cranial trauma increased from 9.0 to 57.7%, while that of cerebral injuries--up to 25% of all hospitalized traumas. Fractures of cranial bones with respect to all kinds of fractures increased from 7% (in 1955) to 13.4% (in 1971), whereas the mortality index (per 100 000 population) as a result of cerebral traumas increased during 5 years (1965--1971) from 1.6 to 5,6. Simultaneously, the scientific medicobiological progress has contributed to improvement of the old classification for closed cerebral trauma, its complex pathogenesis, clinic, diagnosis and treatment. Some useful practical recommencations are given.