Abstract :
<p>Worldwide, Current statistics on HIV/AIDS indicate that one-half of all new HIV infections worldwide occur among young people ages 15 to 24. Every minute, five young people worldwide become infected with HIV/AID due to unsafe sexual intercourse. In Ethiopia, youths aged 15–24 years were more than 15.2 million, contributing to 20.6 % of the whole population. These large and productive groups of the population are exposed to various sexual and reproductive health risks. To assess the risky sexual behavior and associated factor among adolescent student in Dubti secondary school students in Dubti Woreda. Institutional based cross-sectional study was conducted among adolescents in Dubti secondary school’s students in Dubti Woreda, North East zone 1, Afar National Regional State from Feb. 29 to october 16, 2018. Simple random sampling method was used to select study participants or unit and the sample size is 426, this is calculated with Epi info v 7.2.2.6 0pen calculator. Four diploma nurses will be used for data collection. After data collection data were coded, entered and cleared to cheek for completeness outliers and missed values and variables using Epi Info 7. Finally, data was exported to SPSS version 25. All of the respondents were included in the study. The overall prevalence of risky sexual behavior was 13.9% and predominated under the age18. Factors like participation in religious activity of the respondents [AOR=0.105, CI (0.014,0.997)], ever drank alcohol [AOR=22.627, CI (1.361,376.268)], ever Practicing chewing chat [AOR=9.289, CI (1.889,45.666)], ever smoking cigarette or shisha [AOR=9.815, CI (2.534,38.017)] and not cigarette or shisha smoker (AOR=0.10) were the factors that increase the odds of practicing risky sexual behavior. This study has shown that a considerable proportion of students were engaged in risky sexual behavior. Factors like participating in religious education, Alcohol drinking, being smoker of cigarette or shisha and chat chewer, were the factors that increase the odds of practicing risky sexual behavior among adolescent students. Any interventions that can affect the above risk factors may be helpful to protect adolescent’s health in school.</p>