This paper investigates why residents confront with others in the festivals of local communities. Previous studies have shown their interest in the constructing process of festivals and they emphasized that the function of social integration by conducting the festivals in local communities. However, the constructing process includes not only innocent practices but also dramas carefully played by participants. The author analyses the function of some practices citizens conducted by focusing the mechanism of conflicts. The author conducted the research the process of choosing actors and negotiating with elderly participants by organizers of festivals in Hikiyama Festival in Nagahama, Shiga. Drawing on my observations, we could find that the more conflicts escalated, the more participants appeared to be excited. Moreover, participants regard the confrontations as the real pleasure of festivals on local communities. As a result of it, we can conclude that the conflicts have some functions depending on the scene: it sometimes caused tragedy, but it has functions of integration for residents and gives real pleasures for audience. Therefore we should understand the ambiguity of conflicts of festivals on local areas.