Abstract
Recently, some people have problem of foot called splayfoot. The splayfoot is states with less arch than the ordinary people. This symptom may seem not serious. However, it cause pain in walking. And splayfooted people become getting tired easily. Therefore it cause fatigue in daily life. In addition, these symptoms level is depend on the patient. Therefore a commercial arch support produced by same mold is not always suitable for all patients. Thus arch support designed for individual patient is necessary. In this research, we develop ideal arch support for individual patient by using roentgenogram and approximate multi-objective optimization. And we verify the result by using electromyogram.