Cyberbullying is not a problem only based on the the adolescents’ individual characteristics, but also it is better understood by considering the other environmental characteristics such as family and peers. Fundamental aim of this research is to investigate self-esteem and relationships with mother, father and peers as predictors of cyberbullying and cyber-victimization in high school students. The study is conducted using a correlational design. Research group consisted of 1085 students (554 female, 531 male). For the analysis of research data, since the data violated the assumptions of normality, a method of nonparametric Robust Regression Analysis was used. The findings of the study unveiled that the statistical analysis. In terms of cyberbullying model, meeting the expectations of mother’s relationships were negative, the regulations of norms of father’s relationships subscale were negative and whereas the loyalty of the peer relationships subscale was positive significant predictors. In terms of cyber-victimization model, self-esteem was negative, meeting the expectations of mother’s relationships subscale were negative, in the peers relationships subscale trust and identification were negative, loyalty was positive and self- disclosure was positive significant predictors.//