1. Objectives: The purpose of this case is to report the effect of Onbaek-won(溫白元) which is based on Sasang Constitutional Medicine for abnormal uterine bleeding from Endometriosis in Soeumin. 2. Methods: We treated Soeumin patient that had abnormal uterine bleeding from endometriosis. We prescribed Onbaek-won(溫白元) for her physical symptoms. The improvement of her disease was checked her bleeding volume and other physical symptoms. 3. Results: After the Sasang constitutional medication of Onbaek-won(溫白元) was given, her bleeding volume and her physical symptoms was improved. 4. Conclusions: This case study show an efficient result of using Onbaek-won(溫白元) in abnormal uterine bleeding from endometriosis of Soeumin. Onbaek-won(溫白元) was used instead of Semen Tiglii(巴豆).