Tehran University of Medical Sciences Iranian Journal of Public Health 2251-6085 53 10 2024 09 30 2271 2278 Se-Ri Park Department of Psychology, Graduate School, Dankook University, Cheonan, Republic of Korea Sung-Man Bae Department of Psychology and Psychotherapy, Dankook University, Cheonan, Republic of Korea 2022 07 06 2023 04 07 Background: Although cyberbullying has emerged as a serious problem even among adults, most researches have been conducted on the adolescents. We aimed to verify the independent effects of cyber victimization, internet use, and the perception of cyberbullying-on-cyberbullying perpetration in South Korea adults. Methods: The data of 1500, 20s to 50s Korea adults from the 2019 Survey on the Cyberbullying conducted by the National Information Society Agency were used. Results: A hierarchical multiple regression analysis indicated that cyber victimization and internet use were positively related to cyberbullying perpetration. In particular, the perception of cyberbullying was negatively associated with cyberbullying perpetration. Conclusion: This study is an early effort to verify the influence of the perception of cyberbullying-on-cyberbullying perpetration. Educating that cyberbullying is an illegal and dangerous behavior is important to prevent cyberbullying perpetration. https://ijph.tums.ac.ir/index.php/ijph/article/view/29221 https://ijph.tums.ac.ir/index.php/ijph/article/download/29221/8367