AIM: Adolescence is a period of life when new characteristics appear, new experiences occur in young's life. Some of the health risk behaviors of this period have consequences in later adult life. So this behaviours should be followed and evaluated. Aim of this study is to determine and evaluate the frequency of common health risk behaviors and affecting factors and give suggestions to improve individual and community health care services to adolescents. METHOD: A questionnaire consist of questions on sociodemographic features, intentional/unintentional injuries, cigarette, alcohol and substance use, sexual behaviors, body perceptions and physical exercises were applied to all the students registered for 2006-2007 educational year of high schools in Edirne. RESULTS: As a result, life time smoking rate was 29.3%, regular smokers rate was 10.8%, life time alcohol use rate was 52.1%, last month's alcohol use rate was 25.4%, rate of sexually actives was 13.8% among the students. Rate of regular seat belt use was 24.5%. Of all 33.2% of the adolescents have depressive symptoms. Carrying of arm was seen in 3.9%, cutting or piercing weapons in 11.9%, involving in fights was seen in 26.4% of the adolescents. Safety measures for traffic was not commonly practiced but alcohol and cigarette use rates were very high. Upper class and male students have a higher risk. Many risky behaviors have a tendency to be seen together. CONCLUSION: Family physicians, evaluating their patient as a whole should consider this risky behaviors while practicing adolescent patients. It is important to get adolescent, physician, family and school together.