Given the prevalence of school disciplinary violations among teenagers,it is essential to examine how blame attribution should be assigned for such incidents.The study investigated the impact of academic perfor-mance of rule violators on blame attribution among middle school students,and examined the moderating effect of classroom discipline norms on this relation-ship.The findings indicate that the academic perfor-mance of the violators has an impact on the blame at-tribution for their disciplinary violations.Middle school students attributed more blame to the disci-plinary violations of the students with poor academic performance than those with excellent academic per-formance.Furthermore,strong classroom disciplinary norms can mitigate the aforementioned influence.The result suggests that the attention should be paid to the bias of blame attribution caused by the"identity"from academic performance.