Objective: to analyze the validity and reliability of the burnout Questionnaire for university professors, which is a modified version of the Spanish adaptation of the Maslach Burnout Inventory (MBI). Materials and methods: this are a psychometric, cross-sectional, instrumental study, whose sample is made up of 206 professors from the Santiago Antunez de Mayolo National University (Ancash, Peru), 164 men and 42 women, aged 20 to 70 years. age, 165 appointed and 41 hired, who voluntarily participated in the development of the study. Results: it is found that the questionnaire has content validity, for which eight experts were consulted and Aiken's V was determined, which presents an acceptable value equal to 0,91. The construct validity estimated both through exploratory factor analysis, in which the Kaiser Meyer Olkin measure is equal to 0,87; as from the confirmatory factor analysis in which the adjustment measure scores are adequate for teaching burnout (RMSEA = 0,07, CFI = 0,87, TLI = 0,86, NFI = 0,77), and for research burnout (RMSEA = 0,06, CFI = 0,91, TLI = 0,90, NFI = 0,80). The discriminant validity determined by the discrimination index of the items, and all obtained scores higher than the minimum acceptable (r = 0,20). Likewise, the results reveal internal consistency through Cronbach's alpha coefficient (a = 0,92) and Omega (omega = 0,92). Conclusion: It is confirmed that the psychometric properties of the burnout Questionnaire for university professors are adequate, since it shows validity and reliability to evaluate burnout.