This study assessed the factor structure and psychometric properties of the Parent Anger Scale in a sample of 326 parents of children ages 2–18 years. Exploratory factor analysis identified a two-factor solution: parent anger experience and parent anger expression. Subscales based on the items of each factor demonstrated excellent internal consistency and concurrent validity with measures of other negative affect and parent discipline. The Parent Anger Scale subscales also evidenced incremental validity, predicting discipline behaviors uniquely above that predicted by parents’ general anger and general anxiety. Specifically, analyses indicated that the Parent Anger Scale experience and expression scores were each unique predictors of inconsistent and punitive parental discipline after controlling for the influences of general anger and anxiety. However, only the Parent Anger Scale expression score had a significant incremental effect in negatively predicting positive parenting above the effects of parents’ general anger and anxiety. Results suggest that the Parent Anger Scale is a valid and useful measure for assessing anger specific to the parent-child context. However, additional research exploring the factor analytic structure and predictive value of the Parent Anger Scale in a clinical sample is needed.