The purpose of this study was to investigate how the parent’s game addiction has an effect on children’s physical activity, physical self-conception was used by medium. Participants were 230 mothers with children between 5 and 7 years old. One-hundred eighty surveys, excluding those with omitted or odd answers, were analyzed. The data were analyzed with descriptive statistics, bivariate correlation analysis, path analysis using WEB-R 3.0(LAVAAN). The first, as the result indicated, parent’s game addiction affected the children’s physical activity directly. The second, parent’s game addiction affected the children’s physical self-conception. The third, children’s physical self-conception. affected the children’s physical activity. Therefore the effort to increase the children’s physical self-conception may contribute to developing children’s physical activity.