The importance of perceived competance as a mediator of achievement behavior among children is established in variety physical activity. Also, perceived competence has been theorized as having an important effect on children's level of motivation. The purpose of this study was to analyze a relationship between perceived competence of physical activity in gymnastic, game and physical fitness and intrinsic motivation in children. The subjects were selected from the Yongdu elementary school in random sampling. Males(n = 99) and females(n = 88) in grades 4 through 6(n = 187) were given The Perceived Competence Scale, a 24-item motor competence assessment battery, and Intrinsic Motivation Scale with 15-item. The used statistical methods for the data analysis were One-way ANOVA Regression Analysis and Covariance Structure Analysis. This study obtained the results as follows: First, perceived competence impacted on intrinsic motivation. Second, there was a significant correlation between perceived competence and intrinsic motivation.