The paper presents partial results of research focused on the prevalence of cyberbullying among students and their mental condition. In quantitative approach we used electronic data collection. We used a questionnaire of our own design and questionnaire, which captures and evaluates the structure and dynamic of subjective experiences and states. Research sample consisted of 516 students from selected universities of the Czech Republic. The results show that 14.9% of students had personal experience with cyberbullying.