The purpose of this study was to obtain basic data of nutrition education for obese children in Seoul and to examine dietary habits, dietary behaviors, and body image recognition before and after nutrition education. A convenience sample of 69(male : 54, female : 15) obese children was selected from "98 Children Nutrition Camp" in Seoul. The survey design employed a structured questionnaires. The results of this study were summarized as follows ; 1. Anthropometric parameters such as height, weight were measured in 69 obese subjects of age 10~12. 2. Effects of nutrition knowledge were gained by dietary habits, dietary behaviors and body image recognition. 3. Comparison of nutrition knowledge scores for obese children was to obtain basic data of effects for nutrition education.