This study was conducted to examine the effects of an 8-week weight loss program, on body composition, body shape satisfaction, body shape esteem in 15 obese children. This program included nutritional education and regular physical fitness. After completion of this program, height and body weight increased slightly but body compositions changed. BMI, degree of obesity, and body fat levels dropped slightly, however these differences were not significant. After the 8-week program body weight increased from 63.61±8.80 ㎏ to 64.07±9.11 ㎏, degree of obesity and BMI decreased from 151.73±13.62%, and 29.08±2.35 to 146.60±12.92%, and 28.57±2.26, respectively, and the percentage of body fat decreased slightly from 42.70±4.87% to 41.46±4.88%. There were slight changes in weight of body muscle and lean body mass from 19.62±3.48 ㎏ and 36.17±5.78 ㎏ to 20.30±3.64 ㎏ and 37.16±6.18 ㎏, respectively. LBM and amount of muscle were higher after this weight loss program. The body shape esteem score increased from 7.60±4.01 to 9.00±6.20. There was no significant difference in body shape satisfaction before and after the program, and the participants also wanted to be leaner. Finally, body weight, BMI, and body fat showed negative correlations to body shape esteem.