Considering the fact that bullying involves a social domain, and there is a relationship betweenbullying or victimization and psychosocial problems, it would be worth to investigate the relationshipsbetween different bully statuses, school attachment, and loneliness. Thus, this study was designed toexamine the relationships among different bully statuses (bully, victim, bully/victim and bystander),school attachment and loneliness in early adolescents. Based on previous studies, we hypothesized thatadolescents named as victim and bully/victim would differ from bystanders and bullies regardingschool attachment and loneliness. That is victims and bully/victims experience more loneliness feelings,but less school attachment comparing to bystanders and bullies.