The aim of this research was evaluation of influence of milk and dairy products consumption on advance of dental caries observed in the group of children and teenager. The dependences between milk and dairy products (dairy beverages, cottage cheese and other kinds of cheese) consumption and advance of dental caries were analyzed. The objects of the research were 44 patients aged 7-18 years. Elements of the research were the questionnaire survey and the assessment of the patients diet. The statistical analysis was conducted using the Kolmogorov-Smirnov test and Kruskall-Wallis test as far as the coefficient of correlations by Pearson. In the research it was found that cheese consumption contributes to decrease of dental caries coefficient. The need to provide children and teenagers commonly the nutritional education, concentrating on proper model of the diet and systematic consumption of milk and dairy products, was proved.