The purpose of this study was to investigate the characteristics of medical support for children conducted by a specialist in physical education and sports medicine in cooperation with Yogo teacher (= school nurse) at a public elementary and junior high school. The survey was conducted at one public elementary and junior high school in Ibaraki Prefecture for two years from the 2017 to 2018 school year. A certified athletic trainer by the Japan Sports Association and a licensed health and physical education teacher visited the school to provide medical supports for health education on the musculoskeletal system during the growth period. As a result, the rate of utilization was increased with the continuous support activities particularly in the age of junior high school students. In terms of the content of supports, the percentage of “physical consultation” was higher than “first aid”. Providing “icing”, “exercise procedure”, and “taping” were specifically frequent. It is necessary to continue to examine a system that enables us to collaborate with school nurses and teachers effectively.