Background: Young people today are at high risk behavior that could expose them to HIV/AIDSrnand other STIs and threatened by HIV/AIDS epidemic since they are sexually active at youngerrnages and low and/or inconsistent use condoms to ensure protection.rnObjective: To assess sexual behavior, attitudes and risk perception about HIV/AIDS among outof-rnschool anti-AIDS club member and non member youths in Mettu and Bedelle towns.rnMethods: The study applied a case control study design in which the behavior difference betweenrnclub member and non-club member groups examined. The cases are club members thosernregistered in the out-of-school anti-AIDS club and actively participated for at least one year.rnControls are non-club member who have never been registered and never became active memberrnof any anti-AIDS club anywhere in the towns. A pre-tested self-administered questionnaire wasrnused to collect data. Focus Group Discussions was also conducted in the two groups torncomplement the quantitative findings.rnResults: From a total of 786 youths, 386 club member and 400 non-club member participated inrnthe study. In this survey two third of the club members, (66.6%) & one third of the non-clubrnmembers, 33.2% reported to have practiced sexual intercourse in the past. Females were likelyrnmore to start sexual practice at age than males in both groups. Among cases 31.3% reported thatrnthey had two and more than two sexual partners over the past and 29.2% controls reported thatrnthey had more than two sexual partners. Forty five point nine percent of club members andrn33.3%of non-club members had used condoms during the first time they had sexual intercourse.rnThe majority (99.1%) of the study populations were aware of HIV/AIDS. Seventy two pointy fivernpercent of club member and (54.7%) non-club members perceived that they are at risk or may bernat risk of acquiring the HIV/AIDS. The majority (74.6%) of the club members, and 52% of thernnon-club member youths expressed their willingness to undergo VCT for HIV. The prevalence ofrnmultiple sexual partnerships over past year among both groups was 30.3% in the selected towns.rnFGD also supplements that both groups admitted that youths in the towns engaged in riskyrnsexual behaviors such as unprotected sexual intercourse which is the main cause of the spreadrnof HIV/AIDS in the both towns.rnConclusion: The finding of the survey concluded both club member and non-club member outof-rnschool youths in this study area were exercising high risky sexual activities like early sex,rnmultiple sexual partners, and inconsistent use of condom. But, the percentage among clubrnmembers was lower than non-club members. Being a club member is protective for HIV/AIDSrnrelated risky sexual behaviors, perception. So, it was recommended that IEC on sexual healthrnshould be given intensively by concerned bodies to make adolescents protect themselves fromrnthese behaviors.