| Background: Bullying is one of the main behavioral issue of junior high school students that may result in physical, psychological and social problems. Objectives: To determine the factors that affect bullying in junior high school students. Methods: This is a cross-sectional study with data collected from demographics questionnaires, Olweus Bullying Questionnaire (OBQ), Self-Reporting Questionnaire (SRQ-20), Rosenberg Self-Esteem Questionnaire, Parenting Style Questionnaire and FACES III Questionnaire. Data was analyzed using multivariate analysis logistic regression. Results: There were 274 students with age ranged from 12 to 17 years old; 51,1% of them were male. 45,3% students were involved in bullying with 26,3% identified themselves as victim, 11,7% as bully and 7,3% as bully-victim. Analysis using multivariate; logistic regression revealed that factors affecting bullying are permissive parenting style (OR = 2.443, 95% CI = 1.373-4.345), low self-esteem (OR = 1.997, CI 95 % = 1.122-3.555) and extreme family relations (OR = 1.545, 95% CI = 0.686-3.478), while the midrange family relations act as a protective factor against bullying (OR = 0.481, 95% CI = 0.255 to 0.907). Conclusions: Factors that affect bullying behavior in SMP Remaja Pluit are permissive parenting style, authoritarian parenting style, low self-esteem and extreme family relationships. Permissive parenting style has the biggest risk for bullying behavior involvement with 2.4 times greater risk than authoritative parenting style. |