1. Objectives: This purpose of this case is to report that a soeumin patient diagnosed as pleural effusion was treated with Sibimiguanjung-tang and then her symptoms and result of chest X-ray and R-lab improved 2. Methods: We diagnosed the patient as Soeumin-Taeum-byung(少陰人太陰病). So we treated her with Sibimiguanjung-tang 3. Results: After we treated the patient with Sibimiguanjung-tang, her symptoms and result of chest X-ray and R-lab improved 4. Conclusions: This case study show an efficient result of using Sibimiguanjung-tang in Soeumin diagnosed to pleural effusion.