The scope of the school nursing practice tool (SSNPT) is needed to apply and explore the gap between what school nurses perceive as important and actual practices. This study adapted and validated the Korean version of SSNPT (K-SSNPT) among 360 Korean school nurses in January 2022. The reliable and valid K-SSNPT can inform school nurses' workforce policies by capturing the current scope of school nursing practice and setting priorities for improving school health in South Korea.