The violence in school has become a serious problem turning into a phenomenon that is likely to take hold in the educational field. Violence in school is a form of school deviance, which has a lot of forms of manifestation of different intensity. In this article “the problem of school violence” we defined the conceptual notion of Violence, the peculiarities of its manifestation in educational field and the causes of it apparition. I present 3 types of prevention that school should develop, and which complement each other: there are a primary prevention, another is a secondary one and a third prevention. If there are situations of school violence that can’t be resolved by the teacher, teaching teamwork is required, which include more people(tutor, classes teachers, parents, school doctor, psychologists and teachers), able to analyze the problem(forms of violence, its causes) and find solutions.