Previous studies have shown that there is overlap between victimization and the perpetration of bullying, and social and motivational variables are known to mediate this relationship. However, the effects of different moral disengagement strategies have not been studied, despite the fact that they exert a major influence on aggressive behavior. This hypothesis and the moderating role of gender were tested through a longitudinal study (N = 2,066) administered in three waves at 6-month intervals. The results indicated that cognitive restructuring influenced the association between victimization and subsequent bullying. In high victimization scores, boys had higher scores in bullying perpetration compared to girls. The conclusion underlines the importance of the role of morals and ethics in peer relations and in the cycle of violence.