In the cafeterias, the flow of people not only becomes important factor of congestion, but also greatly influences their profits. To examine the solution for the people congestion, modifying the layout, evaluating the effects of changes, and finding the improvement ways need to be iterated again and again. However, we have attempted to solve this problem using simulation from view of time, cost, and avoidance of risk. In our research, as a subject, we took up a cafeteria where some congestion was observed, then analyzed the flow of people and built the simulation model. This paper reports the analysis of this cafeteria, and introduces each module of simulation model we have developed.