The purpose of this study was to examine the relationships among the physical self-concept and worth for physical activity of elementary students in after school physical activity class. For accomplishing this purpose of the study, the 326 subject were selected by the systematic stratified cluster random sampling method from the elementary students in after school physical activity class. To analysis the data collected for this study, using the SPSS/PC+ 15.0 version program, statistical methods utilized for testing the hypotheses were Cronbach\'s α, descriptive statistics, correlation analysis, and standard multiple regression analysis and Amos 4.0 version statistical package. From the analysis of this study, the following conclusions were obtained: Firstly, It shows the differences physical self-concept according to populo-statistical characteristic of elementary students in after school physical activity class. Secondly, It shows the differences worth for physical activity according to populo-statistical characteristic of elementary students in after school physical activity class.
Thirdly, the physical self-concept partially influence on worth for physical activity of elementary students in after school physical activity class. Forthly, there exist causal relationships among types of physical self-concept and worth for physical activity of elementary students in after school physical activity class. This causal model fits well with empirical data.
Key words : physical self-concept, worth for physical activity, after school physical activity class, elementary students