This article analyses the views of cyberbullying prevention among 5-12 grade pupils and teachers in Lithuanian schools. It defines the concept of cyberbullying in the context of school pupils, and analyses the theoretical grounds for prevention of this form of bullying. The article also presents the results of the survey (which was conducted in 2009-2010) and reveals the views of 2064 pupils of 5 -12 grade and their 1062 teachers towards the prevention of cyberbullying. Based on the empirical research, it could be concluded that efforts to prevent cyberbullying among 5-12 grade pupils in school must be consistent, and permanent, and involve the whole school community. From the perspective of the pupils, the most effective measures to prevent cyberbullying should be oriented toward psychological conditioning (to strengthen pupil's self-esteem and to outline the consequences for pupils who are involved in cyberbullying).