Since 1990, research and teaching activities of academic staff in Spanish universities have been periodically assessed. There are national, regional and institutional assessments. Each evaluation is organized in a different way and the organisation itself reflects the importance given to each activity. In most cases, positive assessment are linked to a salary increase and other perk benefits. In this article, we analyse the evaluation system of teaching and research activities and how they could be, in fact, orienting to promote research activities and, as a consequence, to devaluate teaching activities.