The aim of this study was to examine the spread of the dependence on alcohol, smoking and internet and to estimate their connection with psychosocial state among the population of the students of vocational schools. Materials and methods. 395 students between 17-22 years old from Kaunas vocational schools took part in the survey the data of which has been analysed in this study. The habits related to alcohol, smoking and internet were assessed anonymously using the method of frequentative testing and Fagerstrom and AUDIT questionnaire developed for the research of these dependencies. The averages of the sample indications and standard errors of calculations were estimated whilst analysing the data. The criterion of the student (t) was used to compare the average variables of the independent samples. Independency of indications was checked with the help of chi square (x) criterion. Associations are considered to be statistically significant if p < 0,05. Results. After the habits of alcohol consumption had been estimated , it was defined that 89 % of male and 92.1 % of female respondents had tried alcohol and the bigger part of them (40.5%) had used alcohol 1-2 times a month. The most popular drink among girls is champagne ( 33.3 % ) and among boys – wine (50%). The examination of the smoking habits have shown that 79.7 % of girls and 83.8 % of boys have tried to smoke. 15.4% of girls and 33.5 % of boys have smoked 20-29 days during the last month. After examining the habits... [to full text]