This study compared the influence of depressive rumination and negative rumination on depression. In a longitudinal study with a 4-week interval, undergraduates completed measures of depressive rumination, negative rumination, and depression at Time 1, and measures of depression and stressors during the study at Time 2. The results of multiple regression analysis showed that depressive rumination, but not negative rumination, predicted depression at Time 2, even after controlling both for depression at Time 1 and for stressors. These results indicate that depressive rumination is a useful concept for research and clinical practices involving depression.