The purpose of this study was to examine the mediating effects of centrality of event and internalized shame on the relationship between event-related rumination and growth / depression after trauma. For the study, we collected data and performed statistical analysis on 400 adults in their 20s to 50s across the country. The main results of the study are as follows: First, centrality of event partially mediated the relationship between deliberate rumination and posttraumatic growth. The direct effect of deliberate rumination on posttraumatic growth was significant, but the magnitude of indirect effect mediated by centrality of event was relatively large. Second, internalized shame fully mediated the relationship between intrusive rumination and depression. The direct effect of intrusive rumination on depression was not significant, and only indirect effect mediated by internalized shame was significant. Finally, the implications and limitations of this study were discussed.