The purpose of this study was to investigate effectiveness an antibullying parent management training on Student's Victimization and Cognitive Emotion Regulation. This research was semi-experimental design with pre test-post test design and control group. The statistical population of study was all primary schools city of Karaj in academic year of 96-97  and the statistical sample was one of schools in the 12th district of Karaj was selected by random cluster sampling. Then 36 victim students of the fourth and fifth level were selected using California's bully-victimization questionnaire and Granofsky's cognitive emotion regulation questionnaire and randomly assigned to two experimental and control groups of 18 Parents of the experimental group underwent parent management training in 9 sessions of 90 minutes(one session per week). Data were analyzed using SPSS 20 and analysis of covariance. The findings of the study showed that parent management training had a significant effect on reducing the victimization and improving the emotion regulation of students. This study showed the effectiveness of parent management training on reduceing victimization and improve cognitive emotion regulation in students.