The purpose of this study was to define the influence of amount of physical activity and exercise participation factors of elementary school children on their happiness. The subjects were 1,553 elementary school children(boys:765, girls: 788) in Gwangju city and Chunnam province. This study used Lyubomirsky & Lepper(1999)\'s Subjective Happiness Scale and Godin & Shephard\'s sport participation scale. As the results , first there were no difference between groups according to gender and school grades. Second, the boys who lived in the city higher happiness than the other boys who lived in rural. Third, exercise participators show
higher happiness than that of non participators. The students to participate soccer and jump rope showed highest happiness other students to participate any other sports. The students to participate badminton, Taekwondo, and other sports showed higher happiness than that of non-participators. Forth, there were significant correlated between frequence of athletic participation, time of participation and fitness of students and happiness. In analyis of regression, The frequence of athletic participation, fitness, and time of participation influenced on their happiness.