The study aims to test the mediating role of interactional justice on the effect of mushroom management style on organizational cynicism. Data were collected by survey method from 107 research assistants working in a state university in Turkey. The structural equation model (SEM) was used to test the research model. In the study, firstly, the effect of mushroom management style on organizational cynicism was tested. After this step, the mediator variable was included in the research model. As a result of the analysis, it was concluded that the mushroom management style affected organizational cynicism sub-dimensions (cognitive, affective, and behavioral) positively, and affected interactional justice negatively. However, it was concluded that interactional justice does not have a mediating role in the relationship between mushroom management style and organizational cynicism dimensions.