Based on WHO estimation, body weight and physical activity are associated with various chronic diseases and overall cause of death globally. This study aims to determine the relationship between physical activity, motor skill, and social skill in elementary school children in disaster-prone areas. The design utilized in this study is correlational. The subjects of this study were elementary school seniors in disaster-prone areas of Mount Merapi, with a total of 155 students. This study uses tests and measurements as well as filling out questionnaires as data collection techniques. The results of the study show that: 1) there is a significant relationship between physical activity and social skill in elementary school-age children in disaster-prone areas. The correlation coefficient of physical activity with social skill obtained an r count of 0.707 and a significance value (sig) of 0.000. Because the r count is 0.707 > r table 0.157 and the significance value is 0.000 < 0.05, 2) there is a significant relationship between motor skill and social skills in elementary school-age children in disaster-prone areas. The correlation coefficient of motor skill with social skill obtained an r count of 0.828 and a significance value (sig) of 0.000. Because the r count is 0.828 > r table 0.157 and the significance value is 0.000 < 0.05, and 3) there is a significant relationship between physical activity and motor skills on social skills in elementary school-age children in disaster-prone areas. The calculated F coefficient is 278.439 and the sig. 0.000 < 0.05.