This study examined the effects of normative beliefs about aggression and peer attachment on traditional bullying, cyberbullying, and both types of victimization. Cyberbullying departs from traditional forms of bullying in that it is through forms of technology, such as the Internet, which increases situational anonymity. Eight hundred fifty students in Grades 6 through 8 completed a survey that assessed normative beliefs about aggression, peer attachment, and traditional bullying and cyberbullying behaviors, which suggested that students who are involved with traditional bullying are also involved in cyberbullying. Adolescents with higher normative beliefs about aggression are more likely to be traditional bullies, traditional victims, cyberbullies, and cybervictims. Additionally, peer attachment was found to be negatively associated with both types of bullying and victimization. Implications and future directions are discussed. (Contains 2 tables.)