This study aims to investigate the effect of school principals' distributed leadership behaviors on teachers' organizational commitment. For this purpose, correlational survey model has been used in this study. The study group consists of 772 teachers working at secondary schools of Erzurum. The data of the study has been collected by using Distributed Leadership Inventory which was developed by Hulpia, Devos and Rosseel (2009a) and adapted to Turkish by Baloglu (2012), and Organizational Commitment Scale for Teachers which was developed by Üstüner (2009). The data has been analyzed with SPSS programme. Some descriptive statistics such as frequencies, percentages, arithmetic mean and standard deviation have been used. Besides, Pearson Moment Correlation has been used in order to determine the relationships among the variables; and multiple linear regression analysis has been used to investigate predictive power of distributed leadership. According to the findings of the study, it is determined that teachers' perceptions towards school principals' distributed leadership behaviors and organizational commitment are at moderate level. The findings of the study have revealed that there is a positive and significant relationship between school principals' distributed leadership behaviors and teachers' organizational commitment. Besides, school principals' distributed leadership behaviors significantly predict teachers' organizational commitment.