ABSTRACT Although appraisal theorists have pointed out that appraisal–emotion relationships should vary as a function of personality traits, evidence demonstrating this is limited and inconsistent. To examine this issue, Ecological Momentary Assessment was employed in which undergraduates indicated their negative emotions and appraisals at regular intervals for 2 days in natural contexts. The results revealed that individuals higher in Neuroticism showed more negative appraisal styles than those lower in Neuroticism. More important, higher Neuroticism was associated with stronger appraisal–emotion relationships of 4 negative emotions (anger, sadness, fear, and guilt). These findings imply that Neuroticism affects not only how people appraise their environments but also the reactivity of their negative emotions to appraisals.