This study examines the mediating role of dysfunctional attitudes in the relationship between defensive pessimism and general procrastination among university students. The sample consisted of 313 undergraduate students from various departments within a faculty of education. Data were collected using the Defensive Pessimism Scale, the Dysfunctional Attitudes Scale, and the General Procrastination Scale. Structural equation modeling was used to test the hypothesized model. The findings showed that defensive pessimism significantly and positively predicted dysfunctional attitudes, whereas dysfunctional attitudes significantly and negatively predicted general procrastination. Furthermore, the direct effect of defensive pessimism on general procrastination was not statistically significant, whereas the indirect effect through dysfunctional attitudes was found to be significant. These results provide empirical support for a full mediation model in which dysfunctional attitudes mediate the relationship between defensive pessimism and procrastination. The results indicate that defensive pessimism is associated with higher levels of dysfunctional attitudes, which, in turn, are related to a lower tendency to procrastinate. Confirmatory factor analyses and reliability tests indicated that the measurement tools used were valid and reliable. The findings were discussed in relation to the relevant literature.