Purpose: The purpose of the study was to identify the mediating effect of organizational citizenship behavior between job embeddedness and turnover intention in hospital nurses. Methods: Data were collected from 241 nurses in 3 tertiary hospitals and 2 secondary hospitals in Daegu and analyzed using descriptive statistics, Pearson correlations and structural equation model (SEM) with the PASW 18.0 and AMOS 18.0 program. Results: There were negative relationships between job embeddedness and turnover intention (r=-.53, p<.01), and organizational citizenship behavior and turnover intention (r=-.39, p<.01) but a positive relationship between job embeddedness and organizational citizenship behavior (r=.39, p<.01). There was a partial mediating effect of organizational citizenship behavior between job embeddedness and turnover intention (${chi}^2=91.02$, p<.001). Conclusion: The results of this study indicate that organizational citizenship behavior has a mediating effect on the relationship between job embeddedness and turnover intention in hospital nurses, suggesting that enhancing organizational citizenship behavior is required. in order to promote job embeddedness and reduce turnover intention.