Objectives : The purpose of this study was to investigate the prevalence of eating disorder high risk group and eating disorder among whom visit bariatric clinic for diet and its relationship with sex, ages and body measurement. Methods : 742 subjects who visit our clinic both at Seocho and Bundang from January to October in 2004 were surveyed by using EAT-26 to assess their eating attitude. Results : The prevalence of eating disorder high risk group was 17.9% and that of eating disorder was 3.2%. Mean score of EAT-26 was higher in females(13.22±8.52) than males(8.95±5.44) and was significantly higher in twenties than the thirties in females(p<0.05). Mean weight, BMI and % body fat were significantly lower in eating disorder high risk group than normal group(p<0.05). Conclusions : Eating disorder symptomatology was highly prevalent among whom visit bariatric clinic for diet.