A computer simulation of pedestrian flow is an effective method for examining relationships between pedestrian space and pedestrian behavior within that space. However, the characteristics of pedestrian behavior are not fully modeled in earlier studies. In this paper, a model describing pedestrian behavior is proposed by utilizing the concept of mental stress. Unknown parameters of the model are estimated using observed data from real pedestrian behavior. The estimated model can describe the differences of pedestrian behavior according to walkers' characteristics. Through some of the simulations in the proposed model, we can examine comfort or safety of pedestrian flows within crowded pedestrian areas.
