Öz
With the widespread access to the Internet, cyberbullying and cyber victimization situations are frequently encountered. These situations can lead to serious consequences such as the perception of loneliness in adolescence, depression and suicide.. The aim of the study is to investigate the relationship between cyberbullying and victimization in adolescents and the perception of loneliness and to investigate the factors affecting this relationship. The study is a descriptive study using the relational screening model. UCLA Loneliness Scale, Cyber Bullying Scale, Cyber Victimization Scale and personal information form were used as data collection tools. The scales and the information form were applied to 262 students in a vocational high school. In the analysis of data, Independent sample t-test, one-way analysis of variance, Games-Howell analysis and Pearson Correlation analysis methods were used. As a result of the study, a positive relationship was found between the perception of loneliness and cyberbullying and between cyberbullying and cyber victimization. It has been determined that cyberbullying differs with respect to class level, internet connection time and purpose of connection, while cyber victimization differs with respect to class level, internet connection time, monthly income of the family and type of mobile phone.