Abstract
The present medical institution cooperate each other, such as speciality skills or regional peculiarity. However, when disasters, such as an earthquake, an institution may not have function as a medical institution and the balance of the medical service at the time will usually unstable. Restoring medical service, each medical institution also becomes to be stable. In this research, we express relation of the medical institutions as a medical network. Moreover, we get the simulation of the degree of relation of a medical institution. By expressing a medical network, it becomes clear where it needs medical services. And, it becomes possible where we should focus to advance restoration by medical network simulation.