Purpose: This study was conducted to develop the School Healthcare Partnership Scale for School Nurses (SHCPS-S) for children with type 1 diabetes and to validate its psychometric properties.Methods: This was a methodological study. A total 342 school nurses in South Korea participated in the study; 171 were randomly assigned to each group for exploratory factor analysis and confirmatory factor analysis. Data was collected from December 2021 to February 2022 via online survey. The Family Nursing Practice Scale was used to evaluate criterion validity, and the school nurse's professionalism scale and empathy were used to verify concur-rent validity. Content validity review, response tests, and factor analysis were conducted. Results: A 50-items pool was created based on a hybrid concept analysis. Forty items were selected following the content validity review, using content validity index. A 20-item scale with four factors (trusting relationships, balanced responsibility, providing tailored care, and transparent and open communication) was chosen follow-ing exploratory factor analysis. Confirmatory factor analysis for the four factors showed an adequate model fit. The correlation coefficient with the family nursing practice and school nurse's professionalism scale were 0.642, 0.630, and 0.376. The Cronbach's & alpha; was 0.919, and the correlation coefficient was 0.768 in test-retest. Conclusions: The SHCPS-S is a valid and reliable scale to measure school nurses' perceived collaborative relation-ships with parents for children with type 1 diabetes. Practical implications: This scale can be used as a tool in interventional studies to enhance school healthcare partnerships.& COPY; 2023 Published by Elsevier Inc.