This survey explores the effect of organizational culture on organizational trust. The study group includes 253 primary and secondary school teachers working in Balikesir, Turkey and the study has a descriptive survey design. The data was collected by School Culture Scale and Organizational Trust Scale. The results showed that the duty culture is the dominant school culture. It is the principal that the teachers trust the most. The secondary school teachers believe that a success oriented and supportive atmosphere exists at workplace and trust their coworkers more than they do the principal. The support and duty dimensions of organizational culture are significant predictors of organizational trust. Based on the results of the study, it can be suggested that school administrators enhance a supportive culture at their institutions. The theoretical significance of the study is that the results of the study will help to better understand the organizational behavior and the practical significance of the study is that these results can be used to increase the organizational efficiency.