Social change towards inclusion is a very common topic, but progress is slow. Because of its importance in the current educational context, knowing how to speed up this transformation is fundamental. A multiple regression analysis with a transversal quantitative designed survey (n = 245) was conducted. The aim was to identify internal and external factors predicting attitudes towards people with intellectual disability in undergraduate students at the University of Murcia (Spain). According to the expected estimate, the variables 'empathic concern' and 'chosen degree' predict good attitudes towards people with intellectual disability among university students. On the other hand, external variables such as 'previous knowledge about disability' or 'contact with people with disabilities' are not explanatory factors. These findings contribute to the existing knowledge about predictive variables for attitudes towards people with intellectual disabilities in the future Spanish education professionals.