This study aims to examine the mediating role of the locus of control in the effect of organizational trust on organizational cynicism in school organizations with latent variables, including all personnel who directly impact education and training in schools. In this study, the relational scanning model, which is one of the quantitative research methods, was used. The research started with a detailed literature review, and the information on the definitions and theories of the concepts of organizational cynicism, organizational trust, and locus of control were achieved; and a research model was created by developing hypotheses in line with this information. The data of the study were obtained from 385 participants who were selected by simple random sampling method among school personnel working in public schools. Confirmatory Factor Analysis (CFA) and Structural Equation Modeling (SEM) analyses of the obtained data were performed using SPSS and AMOS statistical package programs. As a result of the analysis, it was determined that there is a negative relationship between organizational trust and organizational cynicism, and locus of control has a mediator role in the relationship between organizational trust and organizational cynicism.