This study is aimed to reveal the relationship between secondary school teachers' organizational justice perception levels and organizational happiness levels. The relational scanning model was used in the research. The universe of the study consists of teachers in secondary schools in Izmit District Center of Kocaeli Province. The sample of the study consists of 533 teachers working in General Secondary Schools and Religious Secondary Schools in Izmit district of Kocaeli province in 2018-2019 academic year. As data collection tools, the "Organizational Justice Scale" developed by Niehoff and Moorman and adapted to Turkish by Polat (2007) and the "Organizational Happiness Scale" developed by Paschoal and Tamayo and adapted into Turkish by Arslan and Polat (2018) were used. In the analysis of the data, the Pearson correlation coefficient was calculated for the correlation between variables, and to examine the predictive power of the predictive variables on the predicted variable, first simple linear regression analysis, then multiple linear and multiple hierarchical regression analyzes were done. Research findings reveal that teachers' perceptions of organizational justice significantly predicted their organizational happiness levels. The results of the research show that when the sub-dimensions of organizational justice are examined, the interactional justice and procedural justice sub-dimensions are significant predictors of organizational happiness, but the interactional justice sub-dimension does not significantly predict organizational happiness. The findings obtained as a result of the research show that the studies aimed at increasing the organizational justice perception levels of the teachers will contribute to the increase of the organizational happiness levels of the teachers.