The purpose of the study is to find the impact of social and economic factors in physical activity of children and youth. This study utilized the data from 4th Korean Children and Youth Panel Study(KCYPS), and the analysis were carried out based on the starting sample of 2,009 from ‘the elementary 4 panel’ and 1,978 from the ‘middle school 1 panel’ and 1,984 from the ‘high school 1 panel’, 5,971 full data were used in the final analysis. Data were processed using hierarchical regression analysis and it was statistically validated at the significance level of 0.05. First, Pearson r and Spearman ρ showed that all variables are statistically significant correlations. Second, among the first factors of personal and family characteristics, household income level(B=.113), family composition(B=-.049) and parental education (B=.060) were found on a significant impact on the movement of physical activity time, parental education (B=.027) was found on a significant impact on the subjective evaluation of physical education grades. Third, among the second factors of community-level characteristics, Gini coefficient (B=-.810), wealth concentrating (B=.120) were found on a significant impact on the movement of physical activity time, the Gini coefficient (B=-0.315) was found on a significant impact on the subjective evaluation of physical education grades. Additional factors that determine the coefficient of variation in the level 2 were found to be 0.623 and 0.001 respectively. Therefore, second factors of community-level characteristics are added such as Gini coefficient, wealth concentrating were explained to children and youth exercise time during physical activity 62.3%(p<.01) and subjective evaluation of physical education in grades 0.1%(p<.01). predictive power to
