The main purpose of this study was to verify the factorial structure of the two scales that make up the Multicultural Inventory of Expression of Anger and Hostility from a confirmatory perspective. We performed the Confirmatory Factor Analysis with a non-probability sample of 264 participants from a private university in Lima, Peru. The sampling included university students (25%), faculty members (17.8%) and administrative staff (57.2%). The reliability of the instrument was evaluated using the congeneric, tau-equivalent and parallel models for each of the six subscales of the instrument, as well as calculated based on Cronbach's alpha coefficient with confidence intervals. Results: Factor analysis performed in the present Peruvian sample identified four dimensions for the Anger Expression Scale (Anger-In, Anger-Out, Anger/Control In, and Anger/Control-Out) and two factors for the Hostil...