This study examines the mediating role of moral commitment in the effect of teachers' organizational fit on their organizational happiness and determines teachers' organizational fit, organizational happiness, and moral commitment levels. The research was carried out in a relational screening model. The research sample consists of 396 teachers working in the Karabaglar district of Izmir, Turkey, in the 2020-2021 academic year. "Personal Information Form", "Organizational Fit Scale", "Organizational Happiness Scale" and "Moral Commitment Scale" were used as data collection tools. Pearson moment correlation coefficient and regression analysis were performed with the package statistics program for the data analysis. As a result of the research, a positive and significant relationship was determined between organizational fit and organizational happiness, between organizational fit and moral commitment, and between organizational commitment and organizational happiness. In addition, it was concluded that moral commitment has a partial mediation effect between organizational fit and organizational happiness.