Teachers have the basic role and responsibility in the provision of peace in schools. Therefore, in this study, it was investigated whether there was a relationship between the emotional reactions of the teachers and the level of aggression by gender and profession. The study was carried out on the data obtained from 266 teachers who participated in the study voluntarily. Pearson Product Moment coefficient and MANOVA analysis were performed on the data obtained. As regard the relationship between the teachers' reactance and aggression levels depending on the gender and the time spent in profession, there was a significant relationship for the former while there wasn't for the latter according to the findings obtained via statistical analysis.