The purpose of this study is to explore juvenile cyber-delinquency related factors in both
individual and school levels. Different from previous studies’ focus on whether conducting
cyber-delinquency or on the level of cyber-delinquency, this study focused on the number of
committing cyber-delinquency so that effectively highlighted the individual differences in severity
of the problematic behaviors. Using data from the Korean Children and Youth Panel Study
(KCYPS), we estimated a series of multilevel Poisson regression models. Study results showed
different sets of related factors for different types of cyber-delinquency. Spreading rumors is
related to gender, aggression, relationship with peers and teachers, surfing web in an Internet
cafe, and exposure to pornography on the Internet. Aggression, academic achievement, relationship
with peers and teachers, exposure to pornography on the Internet., on-line game, and going to
coeducational school were related to the illegally using personal information. Gender, surfing web
in an Internet cafe, and on-line game were associated with cyber hacking. Futhermore, the ICC
was different across types of cyber-delinquency and was the largest for cyber hacking among the
variables considered in this study. These results indicate that exploration of related factors and
intervention efforts must be tailored to specific types of cyber-delinquency. Moreover, school level
factors should taken into account considering the significant school level variation in all types of
juvenile cyber-delinquency.