This study aimed to investigate the incidence of violence via Internet as well as the relationship between experiencing and/or committing such violence and the self-concept, social support, parental behaviour, and stress coping strategies. A sample of 249 second grade students of two secondary schools in Vinkovci participated in this study. The following instruments were used: Cyber Victim and Bullying Scale, Social Support Scale, a short version of the Parental Acceptance-Rejection Questionnaire, Marsh’s Self Description Questionnaire III (General Self-Esteem Scale), and The Coping Inventory for Stressful Situations (Endler and Parker). The results of this study show that the prevalence of violence on the Internet in the selected sample is distributed as follows: 24,9% experience and 27,7% commit violence via Internet. Furthermore, the results reveal the difference between participants who partook in violence on the Internet and those who did not, namely parental behaviour, social support from friends and emotion-focused coping. The difference in self-concept was not proven to be significant; therefore the second hypothesis was partly confirmed. Within the scope of the third issue, two hierarchical regression analyses were conducted, the results of which identify the predictors of experiencing violence on the Internet as follows: parental behaviour and committing violence on the Internet, whereas the predictors of committing violence on the Internet are as follows: gender, the amount of time spent on the Internet, avoidance coping, and experiencing violence on the Internet. Committing violence on the Internet is the most important predictor of experiencing violence on the Internet and vice versa, which was expected.