EFFECTS OF CYBERBULLYING ON FACEBOOK TO THE SELF-ESTEEM OF THE STUDENTS Abstract Despite the advantages Facebook as the leading social networking sites around the globe there are also disadvantages arising and one of those is cyberbullying. Cyberbullying have many definitions and most studies showed results to lower self-esteem of the cyber victims and higher level of self-esteem of the perpetrators. Studies are focused in providing treatment to the problem but only few are focused on providing preventive action plan. Being said, this study’s objectives is to determine the effect of cyberbullying of both the cyberbully and cyber victim to the six dimensions of self-esteem such as the social, competence, affective, academic, family, and physical dimension. The study is a quantitative research study, specifically applying the descriptive approach and a random sampling. The instrument of the study in getting the data are the researchers-made questionnaire of cyberbullying inspired by cyber victim and bullying scale developed by Cetin, Yaman, and Peker and the selfesteem questionnaire inspired by Bracken's multidimensional self-concept scale on self-esteem. These survey questionnaires were pilot tested for validity and internal consistency with the results of good and excellent through “Jamovi Software”. To get the result of the variables being quantified, the study will apply the following statistical tools: Frequency and percentage, mean, and Z-test.