Background: Recently, technological development and used gadget influance the physical activity of children especially school age children. Decreasing physical activity on school age children wouldincrease risk factor to have chronic and degenerative deseases in the future, increase case of obesity, affect the mental health, and inhibit physical growth and development toward adolescent. Objective: To know the description of the physical activity level in school-age children in SD MuhammadiyahAmbarketawang 2 Gamping, Sleman, Special Region of Yogyakarta. Research Method: The design of this research is descriptive quantitative with cross-sectional approach with univariate analysis. The samples of the study were 43 respondents by purposive sampling technique. The research instruments used Physical Activity Questionnaire-Children (PAQ-C) and Metaboliq Equivalent Turnover (MET). Result: The level of physical activity by PAQ-C shows that the majority of respondents have a moderate activity level of 65.5%, high physical activity of 23% and 11.5% have low activity.While MET instrument shows that the majority of respondents have moderate level of physical activity of 74.5%, vigorous activity 18.5% and light activity by 7%. Conclusions: The majority of school age children have moderate to severe activities using either PAQ-C or MET instruments.