Background : In this study, we examined body image perception and dissatisfaction with weight and height in children and adolescents, according to age and body mass index. Additionally, we compared our findings with those of previous studies concerning eating disorders. Materials and Methods : In July and August 2008, 1,501 students were sampled from elementary, middle, and high schools in Ulsan and assessed using self-completion questionnaires. We used the Korean version of the Eating Attitude Test-26 (EAT-26) to screen for eating risk groups. Participants were stratified by grade, gender, and body mass index. Results : 1) Dissatisfaction with height, weight, and body image was greater in the older group. 2) Dissatisfaction with weight and body image was greater in the heavier group. 3) EAT-26 scores and the number of individuals at high risk for eating disorders were higher in the female group than in the male group. Conclusion : The EAT-26 score in this study was similar to those found in previous Western studies. 2) There were a number of high-risk individuals in the female group, with a tendency toward earlier presentation. Continuous health management and prevention programs are required.