The purpose of this study was to find out how a 12-week Korean Traditional dance training program influences on Health-related Fitness, growth mediators obese elementary school students and help them prevent and cure obesity and improve health. For this purpose, 17 elementary students(9-10 years old) with obesity level, 20% or more, and body fat, 25% or more, participated in the study. 9 students were randomly assigned to a Korean dance group, and 7 students to a control group. Korean Traditional dance program or Ganggangsulrae was provided 3 times a week, with an intensity of 45-75% HRR. Health-related Fitness test and blood drawing were conducted before and 12 week after the program. For statistical analysis, SPSS 12.0 was used. For finding out the difference within a group before and after the program, paired t-test was applied, and for determining the difference between two groups, ANCOVA was applied with a significance level of α=.05. The study found followings. 1) Weight was significantly reduced among Korean Traditional dance group students after the program (p<. 05), and there was also a significant difference between two groups (p<.01). 2) Body fat significantly decreased among Korean Traditional dance group students after the program (p<.0 5) while control group students showed a significant increase (p<.05). There was a significant difference betwe en two groups (p<.01). 3) Muscular strength significantly increased among Korean Traditional dance group students after the progr am (p<.05), and there was a significant difference between two study groups (p<.05). 4) Muscular endurance significantly increased among Korean Traditional dance group students after the pro gram (p<.05), and there was a significant difference between two groups (p<.05). 5) After the program, flexibility significantly improved among Korean Traditional dance groups students (p <.01). But there was no significant difference between two groups. 6) After the program, cardiovascular endurance significantly dropped in the Korean Traditional dance group (p<.01), and there existed a significant difference between two groups (p<.05). 7) GH significantly increased in the Korean Traditional dance group after the program (p<.01). There was a significant difference between two groups (p<.01). 8) IGF-1 significantly increased in the Korean Traditional dance group after the program (p<.01). There was a significant difference between two groups (p<.01).