The purpose of this paper is to find an answer why employees in organization violate the organizational information security policy. To do this, this study is rooted in the moral disengagment theory. This study found that moral belief and perceived sanction have an effect on security policy violation. However, if moral disengagement is involved in the research model, perceived sanction is not significant. Finally, SETA, moral belief, and perceived sanction have a negative effect on moral disengagement, which in turn moral disengagement influences positively the security policy violation. The conclusions and implications are discussed.