Objective: To assess the construct validity and internal consistency of an Spanish version of the AUDIT questionnaire. Materials and methods: A Spanish version of the AUDIT test was applied to a random-ized stratified sample of 459 University students, it was evaluated the factorability by Kaiser-Meyer-Olkin and of sphericity of Bartlett tests. Later, we determined the internal consistency and factorial structure, by estimating the Cronbach's alpha and factorial analysis extracting by the principal components method. Results: Cronbach's alpha was 0,769. The exploratory extracting technique revealed and unique dimensional structure of the questionnaire. Conclusions: AUDIT test is a reliable tool for detecting problems associated with alcohol use in the clinical environment; it's necessary to deepen in the structural analysis of the questionnaire.