Purpose: The purpose of this study was to identify the effects of the obese program on BMI, body composition, physical fitness, knowledge, eating behaviors among the elementary school obese children. Method: They ranged from the third to sixth grades with over 30% body fat ratio. The subjects consisted of 31 obese children who participated in the obese program and 34 obese who did not participate in the program. The contents of the programs for nine weeks from contained obese education, counseling and exercises once a week. The program lasted from Oct. 8 to Dec. 22, 2001. The Data were analyzed using SPSS program. Result: Flexibility was significantly higher for the program participants than the nonparticipants at the post-test. Agility was significantly higher for the program participants than the nonparticipants at the post-test. Knowledge were significantly higher for the program participants than the nonparticipants at the post-test. Conclusion: This study provides evidence that obese program is effective in changing the flexibility, agility, knowledge in obese elementary children over 9 weeks.