Considering the causes of bullying behavior, the situations caused by it and its impact area, the formation of bullying in the cognitive dimension draws attention. In this context, examination of thoughts or cognition about bullying becomes an important element in explaining bullying. In this study, it is aimed to examine moral disengagement tendencies, attitudes towards violence and irrational beliefs as predictors of bullying cognition of adolescents between the ages of 15-18. Study group consisted of 369 individuals, 197 females and 172 males. Bullying Cognition Scale, Moral Disengagement Scale, Attitude Towards Violence Scale and Irrational Beliefs Scale for adolescents were applied to participants. The data obtained were tested by hierarchical regression analysis. Moral disengagement tendency, attitudes towards violence and irrational beliefs (demands for success and for comfort sub-dimensions) predicted cognition about bullying significantly. It was determined as a result of hierarchical regression analysis that these variables predicted bullying cognition both separately and together. At the end of the study, suggestions for the studies to be carried out for bullying, which would be handled within the scope of cognitive structure, were presented.