Aggressive behavior is a bad characters that aims to harm others. It can wreak to others or the individual itself. One of the factors that influence it of soccer supporters is the high level of fanaticism. Supporters are one form of social groups that are relatively irregular and occur because they want to see something. This crowd is almost the same as audiences but unplanned. The purpose of this study is to describe aggressive behavior of soccer supporters in liga Indonesia. This study uses a qualitative method. Informants from this study were chosen by purposive sampling with the characteristics of soccer supporters who live in Jakarta, Bandung and Malang. The results of this study show that 1) Aggressive behavior on the supporters arise because of the rivalry football club at the time of the game and the provocation between supporters 2) Aggressive behavior of verbal supporters who sing songs with ribaldry and racist, 3) Aggressive behavior encountered on supporters are physically provoked and then throw objects sych as plastic bottles at each other and damage facilities. Aggressive behavior in supporters arise because of the rivalry and mutual provocation between supporters, then arise aggressive behavior verbally and physically.