Organizational citizenship behavior(OCB) is defined as certain patterns of behaviors in the workplace that are beneficial to organization, discretionary, non-formally prescribed, nor reward-motivated, and voluntary in nature. The purpose of this study is to empirically ascertain the relationship between teachers' OCB level and school principals leadership behavior. From metropolitan areas, 789 teachers and 417 school principals participated in OCB and leadership survey. Survey results showed that first, there are significant positive correlations between perceived OCB level and school leadership behaviors. Second, the study showed that different leadership style did influence on at least 2 components of teachers' OCB. Third, school principals' perceived significant positive correlations between school leadership behaviors and teachers; OCB level. This study confirmed that there are significant relationships between teachers' OCB level and school principals' ledership behavior. A number of recommendations were proposed including the strengthening of teacher development and in-service training with OCB curriculum.