Risky behaviors are defined as behaviors that increase the possibility of adverse physical, psychological, and sociological consequences. In adolescents such behaviors tend to be interrelated and have co variation patterns. Due to its unfavorable and irremediable consequences such as pregnancy, infective diseases, and HIV, sexual risk-taking has been recently highlig-hted more than other high-risk behaviors. Current study focuses on the frequency and co-occurrence of various risk-takings, and the influence of different demographic factors.The sample included 807 high school students) 436 girls (, studying in grade 2, 3, and 4, selected through stratified sampling proportionate to the size. To measure risk-taking behaviors the Iranian Adolescents Risk-Taking Scale (Zadeh Mohammadi, Ahmadabadi, and Heidari, 2007) was used. Results showed positive and significant relations between the high-risk behaviors. The highest sexual risk–taking variance among aodolescents could be found in relation with alcohol, being with opposite sex, drug use, gender, and social status.The results suggest that health authorities, and Ministry of Education should keep students away from development of high-risk behaviors.