Objectives : This research was performed to investigate the effect of five element constitutional acupuncture(Sa-am acupuncture) therapy at acupoints on the Yin meridians on obese rats(Sprague Dawley strain, male) induced by high fat diet. Methods : The control and acupuncture groups were provided with high fat diet, and the acupuncture groups were treated with five element constitutional acupuncture(Sa-am acupuncture) every other day for five weeks. We observed the body weight gain, food intake, riglyceride, total cholesterol, HDL-cholesterol, AST, and ALT. Result : The acupuncture group treated with five element acupuncture on the meridians of spleen, heart, pericardium showed significant decrease of body weight, the groups treated on the meridians of lung, heart, pericardium showed signigicant decrease of food intake. Concentration of HDL-cholesterol was significantly increased in the groups treated on the meridians of spleen, heart, pericardium, liver. Conclusion : Reviewing these experimental results, it appears that the five element constitutional acupuncture(Sa-am acupuncture) therapy at acupoints on the meridians of spleen, heart and pericardium have an efficacy on obesity induced by high fat diet.