This study examined the pattern of associations between dimensions of personality dysfunction, dysfunctional beliefs, and adverse emotional outcomes. We recruited two samples of undergraduates (n = 167; n = 104). Dysfunctional beliefs showed positive correlations with pathological personality dimensions Negative Emotionality, Introversion, and Psychoticism, and negative correlations with Big Five dimensions of Emotional Stability, Conscientiousness, Openness, and Conscientiousness. Hierarchical regression analyses showed that dysfunctional beliefs are predictive of adverse emotional outcomes above and beyond dimensions of personality dysfunction. Dysfunctional beliefs also mediated the relationship between personality traits (Negative Emotionality, Emotional Stability) and important emotional outcomes like depression, anxiety, anger, demoralization and cynicism. The implication of the mediation analyses is that dimensions of personality (i.e., Negative Emotionality, Emotional Stability) have their effect on a variety of affective outcomes by operating through the mechanism of dysfunctional beliefs.