In this paper, we pay attention to strong atmosphere of a group momentarily constructed by a place because the agent who expresses gesture and face expression gathers plurals. We called the atmosphere socially constructed as group pressure of agents. The purpose of the paper is to develop a group pressure and investigate the influence to human. We verify if the group pressure made by multiple life-like agents exert an influence on the judgment of player by using the cross-cultural simulation game we developed before.