Despite significant research on parental emotion, parents' regulation of their own emotions during discipline encounters is an understudied topic. Progress in this area of inquiry would be enhanced by the development of valid measures of emotion regulation. The present article describes an evaluation of such a measure, the revised Parental Emotion Regulation Inventory (PERI2). Mothers of 2-year-old children (N = 232) completed the PERI2, additional questionnaire measures, and a parent-child observation during home visits. The present findings support the factorial and concurrent validity of the PERI2's suppression (e.g., concealing negative emotion), capitulation (e.g., giving into aversive child behavior to reduce negative emotion) and escape (e.g., walking away mid discipline encounter to reduce negative emotion) factors. Suppression, capitulation, and escape were distinct but interrelated emotion regulatory behaviors that were associated with such factors as harsh parenting, lax discipline, parental maladjustment, and child physical aggression. In contrast, the psychometric adequacy of the reappraisal factor (e.g., thinking differently about the child's behavior to reduce negative emotion) was not supported. The results support the future use of the PERI2, minus the reappraisal factor's items.