Assessing students' views on school quality of life is guiding in improving and securing the quality of school education, but it is thought to provide a basis for improving the quality of education. In this context, it is aimed to develop a valid and reliable measurement tool for the quality of school life of students who study at primary education (primary-secondary) level. The study category is obtained from 6700 students who study at primary and secondary school levels in the 2019-2020 academic year in Malatya. For validity studies, exploratory and confirmatory factor analyses were carried out, and also itemtotal correlations were estimated. For reliability studies, Cronbach Alpha internal consistency coefficient and test-retest correlation coefficients were estimated using the relevant software. Exploratory factor analysis using promax rotation yielded the presence of three components with fifteen items. Factor loadings of the items range between “. 533” and “. 816”. Extracted one factor explained 64.887% of total variance. After these stages, whether three structures of the scale is appropriate or not was examined by confirmatory factor analysis. Goodness of fit indexes (CMIN= 451.298, df= 82, RMSEA= 0.038, GFI= 0.980, AGFI= 0.97, CFI= 0.99, NFI= 0.98, IFI= 0.99, RMR= 0.025) indicated that the construct validity of the scale has been provided. Cronbach Alpha coefficient of the scale was obtained “. 921”. The analysis of the test-retest scores gathered from 300 students for three week intervals revealed the score of “. 827” indicating the instrument is reliable over time. The results of the analysis show that the School Happiness-Life (OMY) Scale is a valid and reliable scale.