Objectives : The purpose of this study is to find out whether Insook-san has any effects on children with disorder of sleep. Methods : The subject are in regard to 6 children with disorder of sleep who visited Dong-so Oriental Medicine hospital from September 2003 to June 2004. The herbal therapy are applied. Result : After treatment, the symptoms (Insomnia, sleep terror, night-mare, night crying etc.) were improved. Conclusion : More studies about the Oriental medical treatment and conception on disorder of sleep are needed.