This study aims to analyze the role of Organizational Commitment Mediating the Effect of Work-Life Balance on Organizational Citizenship Behavior. This study was carried out at the Denpasar City Land Office. The number of population and sample used is 150 employees, with the saturated sample method where all the population is the sample in this study. The data collection method used is a questionnaire. In this study, the data analysis method used is Structural Equation Modeling (SEM) analysis based on Partial Least Square (PLS). The results showed that work-life balance has a positive and significant effect on organizational citizenship behavior and organizational commitment, organizational commitment has a positive effect on work-life balance and is able to mediate partially (complementary partial mediation) on the effect of work-life balance on organizational citizenship behavior. It can be concluded that the stronger the work-life balance, the higher the organizational commitment which results in increased organizational citizenship behavior.