A lot of passengers were died in ship disasters, such as Titanic, recently Scandinavian-Star, and Estonia. In order to enable safe evacuation from the ship in casualty, it is important to lead evacuees effectively and to design ship so that safe evacuation can be possible. For this purpose it is necessary to understand human behavior in case of emergency. To investigate human behavior the experiments with human subjects under real condition are preferable. However it is too dangerous to do so. Therefore instead of real-sized experiments, we decide to develop and use the simulator using VR technique. In this paper, how to model the evacuees decision and behavior is introduced, and the model obtained by the experiments outline of which are explained briefly in this paper.