In Egypt female adolescents are on a daily base victims of various forms of sexual harassment as young females re unable to justify their feelings, thoughts and behaviors toward such violent and hostile activities. Therefore, this study develops an adolescents’ sexual harassment index (ASHI), which measures female adolescents’ perception of the threat of sexual harassment based on cultural, environmental and societal aspects. A total of 874 adolescents age 17–18 in Egypt participated in a survey consisting of 65 items of 7 variables: threat of SH, exposure, society awareness, child’s characteristics, social engagement, religiosity and the effect of the media. Using factor analysis with oblimn rotation, the analysis explained 42.38 of the variation in the study variables, leading to a four-factors solution: society awareness, interpersonal characteristics, personal engagement and sense of self and reality.