The aim of this study was to evaluate the attitudes of Lithuanian secondary school children toward addictive behaviors, their promoting and preventive factors with regard to the age. MATERIAL AND METHODS. The study sample consisted of all 5th-, 9th-, and 12th-grade schoolchildren of 6 secondary schools in Kaunas and Šakiai (N=856). Schoolchildren were surveyed with a questionnaire consisting of the questions about their attitudes and experience regarding addictive behaviors and factors promoting and preventing such behaviors. RESULTS. Smoking (82.8%), use of illegal drugs (81.0%), and consumption of strong alcoholic beverages (80.6%) were most often indicated as addictive behaviors. Consumption of light alcoholic beverages and computer gaming were least often indicated as addictive behaviors: by 67.2% and 57.1% of respondents, respectively. Less than one-third (32.7%) of respondents answered that they had one or more of potentially addictive behaviors: computer gaming (27.8%), consumption of light alcoholic beverages (24.6%), smoking (16.3%), and consumption of strong alcoholic beverages (12.1%). The most significant difference was observed between the answers of schoolchildren of 5th and 9th grades. Friends (38.4%), TV (37.9%), and Internet (24.6%) were most often mentioned as influencing a wish to try and abstain from addictive behaviors. Fear for one's health (74.4%) and possible impediment for the life (71.4%) were the most frequently mentioned reasons for abstaining from addictive behaviors. CONCLUSIONS. Involvement in potentially addictive behaviors and acknowledgement of their risks were found to increase with the age of schoolchildren, most significantly from 5th to 9th grades. Consumption of light alcoholic beverages was the second most prevalent behavior among respondents, highly noticed in advertising, but least often acknowledged as addictive behavior. TV and Internet were most often mentioned by respondents as mass media influencing their wish to try or abstain from trying addictive behaviors. Reasons for abstaining from addictive behaviors differed with regard to the age but fears for health and life impediment were most prevalent in all grades.