Cybersex behavior in Indonesia has increased since 2012 in West Sumatra. It was found that the number of teenagers who had watched and read porn sites which are categorized as passive cybersex was 35.98%. This study aimed to determine the factors that influence cybersex behavior in adolescents and suppress the impact on reproductive health. This research was an analytic study with a cross-sectional research design and a total sample of 88 people. The research was conducted from April to July 2023 at Senior High School (SHS) X Pariaman City. Data was collected using a questionnaire which contained questions about the factors that influence cybersex behavior, namely accessibility and access costs. Data analysis used SPSS, namely univariate and bivariate analysis. Less than half (27.3%) of students at SHS X Pariaman City engaged in cybersex behavior in the high-risk category. The results of the bivariate analysis showed that there is a relationship between attitude (p-value=0.004), and the role of peers (p-value=0.002). There was a relationship between attitudes and the role of peers in cybersex behavior. For this reason, it is expected that adolescents will choose peers who can have a positive influence and utilize the media to develop their abilities positively. Keywords: Adolescents, Behavior, Attitude, Role of Peers, Cybersex