The obesity induce not only physical problem, but psychological and emotional problem. The focus of body contour procedures is the body's unequal distribution of fat. Aminophylline is a β2-adrenaline agonist, an adenosine inhibitor, and a phosphodiesterase inhibitor. It activates c-AMP, and facilitates lipolysis. Forty rats were used to study the effect of aminophylline subcutaneous injection, and divided in four groups, In the control group(n=10), saline was injected to subcutaneous fat of the abdomen. In the experimental group, aminophylline 50mg/kg(n=10), 100mg/kg(n=10) and 200mg/kg(n=10) were injected. The injection was done daily for three weeks. The four groups were measured by weight, abdomen circumference, biochemistry, and histopathological test. There were no difference among the four groups. In conclusion, aminophylline subcutaneous injection is not effective in the reduction of regional and systemic fat.