Clinical and epidemiological examinations were made in rural junior (8-10-year-old) schoolchildren from the Vyazma District, Smolensk Region. The clinical findings were compared with the results of evaluation of sanitary-and-hygienic school welfare (SGW), made by the regional branch of the Russian Inspectorate for the Protection of Consumer Rights and Human Welfare, and with those of a sociological survey of school directors and teachers. In the rural schools referred to as Group III morbidity, the incidence of diseases was ascertained to be significantly higher and their patterns had its peculiarities as compared to good hygienic and social educational institutions. There was evidence that the worse schooling conditions, the more children suffered from chronic diseases, chronic mental diseases and physical malformations in particular.