Objectives: Many studies concing the roles and functions of school nurses exist,however,such studies are very limited in Turkey and there is any research on a comprehensive measuring tool that can evaluate teachers’ and parents’ perceptions and expectations of school nurses roles.The purpose of this study is to develop a valid and reliable assessment tool that can be used to determine parents’ and teachers’ expectations of school nurse’s roles.Methods: For the methodological research Parents’ and Teachers’ Expectations of School Nurse’s Rolesscale was designed and administered at primary and high schools in Turkey.To assess the data,assessment of item variability,intal consistency,factor analysis,correlations between the scale and subscales,and test-retest reliability were utilized.Results: The content validity index for the scale was 0.94.As a result of core components analysis varimax rotation,7 factors were obtained from 54 items.Cronbach’s α coefficient for the factors ranged from 0.82 to 0.92.The intra-class correlation coefficient for the test-retest reliability was 0.859,P ＜ 0.001.Conclusions: The scale was a rather valid and reliable assessment tool in determining the parents’ and teachers’ expectations of school nurses’ roles.