To evaluate the anti-obesity efficacy of Gamitaeeumjowi-tang consisting of Taeeumjowitang and Daehwang. Eleven male(n=4) and female(n=7), obesity patients were recruited by Tenten Diet Network from November 2005 to February 2006. All the subjects were treated with Gamitaeeumjowi-tang 3 times a day for 12 weeks. Weight, BMI, body fat weight, Total cholesterol, LDL, HDL, Triglycerides, GOT, GPT, and CT results were evaluated before and after the 12 week treatment. Weight, BMI, body fat weight, total cholesterol, triglyceride, and subcutaneous fat in upper and lower abdomen all showed significant decrease after 12 weeks of administration. Also Gamitaeeumjowi-tang showed no toxic effects based on liver function test. Taken together, The potentials of Gamitaeeumjowi-tang as a safe and effective treatment for obesity has been recognized through this study. Further large sample sized and double blinded randomized control trials are needed to fully confirm the findings of this study.