Objectives: The purpose of this study is to report the effect of Gobonjibung-tang on menorrhagia diagnosed as Qi deficiency. Methods: The patients had menorrhagia caused by adenomyosis and multiple uterus myoma. We diagnosed them as Qi deficiency and treated with Gobonjibung-tang for two weeks from a week before the menstruation. And during the rest period they were treated with Bojungikgi-tang or Ikgibohyeol-tang. After three menstrual cycles, we observed whether the amount of menstruation keep reduced for two menstrual cycles. Results: Amount of menstruation were reduced during three menstrual cycles with taking herbal medicine and two menstrual cycles without taking herbal medicine. As a result of contacting with patients 4~6 months after treatment, the amount of menstruation was maintained at a reduced state. Conclusions: Gobonjibung-tang is effective in patients with menorrhagia diagnosed as Qi deficiency and the effect is continuous.