Violence – especially violence against children – is one of the biggest problems in the world and in Lithuania as well. The consequences of violence are very painfull, it’s physical, moral and material damage is tremendous. In spite of that our society is still unable properly to solve this problem. The worrying fact is that quite a big number of children undergo violence not only at home or in the street, but also at school. The responsible authorities should pay more attention to this fact and should make every effort to prevent that. In order to organize prevention first of all we need objective, reliable and full information about the fact of violence and it’s spreading in school. The purpose of this paper is: a) to analize the atitude towards violence in school by schoolchidren themselves (what boys and girls think about that); b) to clear up the scale of violence among the teenagers of different sexes; c) to disclose the attitude of the schollchildren of different sexes towards the prevention of violence. In order to find out the attitude of the most interested group the main method of research was chosen as questionnaire. During the research the hypothesis was corroborated : the teenagers of juniour age at school undergo violence, their safety and the kind of violence depend on sex.