This study investigated homophobic victimization, teacher support, and school commitment in Brazilian schools. Participants were 339 students, ages 11 to 18 years old, in two public schools in Brazil. Data were obtained using the Brazil Preventing School Harassment Survey. Structural equation modeling revealed that both homophobic and nonhomophobic victimization were negatively related to school commitment but that homophobic victimization was a stronger predictor. Results supported the hypothesis that supportive teachers can moderate the relationship between victimization and school commitment. Finally, the moderating effect of teacher support was stronger in instances of frequent homophobic victimization. (Contains 2 tables and 5 figures.)