In the cafeterias, the flow of people not only becomes important factor of congestion, but also greatly influences their profits. We have attempted to solve this problem using simulation. In our research, we took up a cafeteria where some congestion was observed as a subject to analyze the flow of people. This paper introduces overview of the simulation using simulation model which is built from this analysis. Evaluation of the simulation performed with the use of this simulation model and its result also are reported. And then, we describe the consideration about the solution which was obtained as countermeasure of congestion relief.