This study was conducted to investigate the moderating effect of supervisor's support in relation to violence experience and organizational commitment among staff of special department nurses. Methods: Participants in this study were nurses working in the emergency, operating and intensive care units of five general hospitals in B city. Data were collected from Aug. 6 to Sep. 14, 2018. Data were analyzed using t-test, ANOVA, Pearson's correlation coefficients and multi-group path-analysis. Results: The organizational commitment showed a negative correlation with violence experience (r=-28, p<.001) and a positive correlation with supervisor's support (r=.27, p<.001). There was a negative correlation (r=-.37, p<.001) between violence experience and supervisor's support. As a result of verifying the moderating effect of supervisor's support in relation to violence experience and organizational commitment, there was no significant difference in the path between the high and low supervisor's support groups (∆x 2 =1.07, p=.300). Conclusion: There was no buffering effect of supervisor's support in relation to violence experience and organizational commitment of nurses in special departments. Further research is needed to explore variables that show a moderating effect on the relationship between violence experience and organizational commitment.