Using an individual-by-environment framework, this study evaluated the role of individual- and group-level moral indices and their interaction in predicting student reports of bullying. The sample included 1,009 Italian adolescents (36% girls) from 56 classrooms (mean age = 15.02 years, SD = 0.71). Individual-level predictors included gender and emotions of moral disengagement, whereas group-level predictors included pro-bullying behaviors and class bullying norms of accepted students. Results showed that emotions of moral disengagement were associated with individual bullying and that both measures of group bullying norms--class levels of pro-bullying roles and class levels of bullying by accepted students--were associated with bullying at the classroom level. In addition, a cross-level interaction was also observed; emotions of moral disengagement were associated with increased bullying when levels of pro-bullying behavior in the classroom were higher.