Evacuation training simulator based on the walk-through in the virtual space is suitable for stacking up pseudo evacuation experiences. However, it usually takes time to master the operation of moving in the virtual space. This is considered to be a fatal problem at the event having the limit of time such as a disaster reduction workshop for general citizen. From the different view paint, it can be considered that the operation of moving becomes simple if the moving path is limited to the rail which shows no room for user’s selection. Therefore, an automatic route generation method for setting rail in the virtual space is proposed in this paper.