Objective : The purpose of this study was to evaluate the effectiveness of obesity management program on height and body Composition and its correlationship with constitution types, obesity grade, and the frequency of attendance among the elementary school student. Methods : The subjects consisted of 75 elementary school student who participated in the obesity management program and got the constitution type test and height and height-body composition test(2 times). The program contained proper lifestyle education, dietary education, exercise and so on once a week for nine weeks. The data were analyzed with SPSS 12.0 for Windows. Results : Height and body composition were significantly improved at the post-test. Among constitution types, obesity grade, and the frequency of attendance, obesity grade by BMI was correlated with the change of height and body composition. Conclusion : These results provides evidence that obesity management program is effective in improving height and body composition for elementary school student.