EN
The domination of new technologies in the lives of children and the youth leads to its consideration in the context of threats and a potential negative influence on adolescents’ functioning. Considering various threats occurring in the virtual space, first of all it is indicated that the Internet, due to apparent anonymity, is often the space of mutual aggression, mocking and attempts to discredit other net users. The presented study refers to the analysis of behaviours being a demonstration of cyberbullying. The research was conducted in conformity with the quantity-quality paradigm. It involved a method of diagnostic survey using the technique of a questionnaire and documents analysis. As the conducted study showed, cyberbullying is a phenomenon which often occurs among contemporary teenagers. The examined persons were most often victims or witnesses of verbal aggression in the net.