The paper titled “Epidemiological Pattern of Bullying Among School Children in Mazandaran Province, Iran” (1), published in Archives of Trauma Research, has been retracted by the journal editorial board, as it is found to be a duplicate publication from the published paper titled “Epidemiological Pattern of Bullying among School Children in Mazandaran Province-Iran” by the same authors, published in Journal of Child and Adolescent Behaviour in June 2014.The decision has been made based on the COPE (Committee On Publication Ethics) rules by the Kowsar Publication Ethics Committee.