The purpose this study is : 1) to analyze the sports attitude and situation of obese children. 2) to develop and apply physical activity program for them, 3) and to study the change of attitude for sports of them. Twenty of fifth school year obese student of above medium degree were resarched for nine weeks, three times a week, in K elementary school, in K city . Standard Weight Method was used on the decision of obese degree. Fifteen questions were used from the examination for physical study attitude of Kobayashi to analyze the sports attitude before and the application ( a=.83) And the result was gotten as follows: 1. the situation before the application of physical activity The students being examined recognize the need of sports, but don\'t likt it. and seldom of them involve in sports regularly. with plan, and for the sports which they do actuaylly. passive ball games are for the boys. and mild individual events are for the girls. 2.After the application of the physical activity program 1)Meaningful difference was shown(P<.05) before and the application of the physical activiry program, in Delight Domain. and this is thought that the physical activity program improved Delight Domain. 2)Meaningful difference was shown(p.<05) before and after the application of the Evaluation Domain. so, this can be thought that the physical activity program improved Evaluation Domain. 3)Meaningful difference was not shown(p>.05) statistically in Value Domain(p=.553) this that nine weeks is too short to change their value for physical activity meaningfully .