Objective : Obesity is related to psychological problems as well as physical problems. This study was designed to investigate the depression of over weight and normal group who visited to obesity clinic for diet therapy. Methods : 67 patients were selected(obesity group 42, normal group 25), they were treated medically in obesity clinic of Dong-Seo Oriental Hospital. We checked age, sex, education level, relative weight, BMI and Beck Depression Inventory(BDI) in two group. Results : The results were summarized as followed. 1. The ratio of Relative Weights are $137.45{pm}12.77$ in over weight group, $108.48{pm}9.11$ in normal group. 2. The ratio of BMI are $28.61{pm}2.94$ in over weight group, $23.04{pm}1.83$ in normal group. 3. The results of BDI score are $10.60{pm}7.15$ in over weight group, $12.56{pm}8.33$ in normal group. Conclusions : These results suggested that the patients who participated in diet therapy had mild depression and we should pay attention to psycological problem as well as the physical problem when we treat obesity.