The problem of this work was to analyze the problem of the current topic of these days, and that is youth and violence among and over them. Unfortunately, this is a topic that appears more and more often, many examples of the same are found and discussed today. The emergence of peer violence was due to the accelerated development of digital technology and the increasing use of social networks. General violence and peer violence are certainly very common. Young people can be upset and attacked at school, but also outside it. The most common time when violence accurs among young people is adolescence. Young people are then particulary vulnerable group that brings development into a adulthood. In the proces of adolescence there is usualy a lack of life value and satisfaction. During this period, problems develop apropos this orders of excessively controlling behavior. In addition, in this work the concept of violence, the consequences of peer violence will be introduced in detail. Violence will be analyzed in which places is most common, at the school media and social networks. And the end of the work, and attempt will be made to indentify prevetion that could contribute to its prevention.