This study investigated the effect of a comprehensive exercise program integrating five different categories of behavior development on children`s athletic ability and behavior. This research involved 30 six-year old children, who were divided into two different groups. The experimental group practiced the comprehensive exercise program while the control group had a normal exercise program. Each group consisted of 15 children. The pre-treatment and post-treatment test tools used for the study were "The Exercise Ability Test" jointly created by Oh Jin-gu, Oh Hak-su, and Oh Dae-sung(1984) and "The Measurement of Evaluating Behavioral Development" by Lee Eun-hae and Go Yun-ju(1988). For the pre/post-treatment test, the researcher and teacher evaluated each child for two days. The study was carried out five times a week for a total of 22 times for the entire research period excluding the pre-treatment test and holidays. The research period was five weeks in length and each class was 35~40 minutes long. The comprehensive exercise program was designed to develop not only athletic abilities such as adjustment, flexibility, muscular strength, cardiopulmonary endurance, explosive muscular strength, coordination, agility, equilibrium, and muscular endurance but also behavioral patterns in five different categories including health, society, expression, language, and exploration. Both the pre-treatment test and post-treatment test for each athletic ability and five different categories of behavioral development were scored and the data resulting from the research was treated with ANCOVA which set the pre-treatment test of the two conditions as common vriables. The results of this study are as following: 1. The comprehensive exercise program is effective in increasing a child`s athletic ability. 2. The comprehensive exercise program in effective in improving a child`s different behavior development categories such as health, society, expression, language, and exploration.