This study was designed to investigate the effects of Bang-Pung-Tong-Seoung-San on obese patients. Materials and Methods 20 patients that take Bang-Pung-Tong-Seoung-San during 3weeks at obesitic clinic, Conmaul Oriental Hospital from June 2000 to October 2000 were selected for this study. Results In the change of body composition, the reduction of weight was 2.46±1.31㎏, the reduction of percent body fat was 1.34±0.84%, the reduction of BMI was 0.96±0.47. Conclusion This study shows that Bang-Pung-Tong-Seoung-San is effective on weight reduction.