Peer violence is a phenomenon that many children experience almost everyday. It includes aggressive behavior between peers, usually causing physical and psychological damage. Such behaviors most often occur between completely different children, where the attacker is an aggressive and strong child while the victim is a withdrawn and quiet person. Attitudes that diminish the seriousness of such behavior, describing it as children’s quarrels, undermine its real seriousness. Although children use various forms of violence, no type is less painful that the other as it leaves serious and long-term consequences for the child. The consequences develop from simpler ones to those more serious and include emotional trauma, problems with concentration and learning, the development of anxiety and depression, withdrawal, while in the worst case they can lead to suicide. Although the motives for such behavior have different reasons, bullies are often children who lack love and attention, which they try to get in wrong ways. One of the most important items is prevention, which makes it possible to prevent violence or the development of worst forms of behavior. A key role in prevention, apart from that of parents who represent the foundation for the child’s development as a healthy person, is played by schools and teachers. The school plan includes the actions of all school staff which is adapted to each student, taking into account his family history, culture and experiences. It is very important that educational staff empathize with the student, set clear rules and boundaries, recognize and prevent inappropriate behavior and help the child find acceptable substitute behaviors.