Background: The purpose of this study was to study the classical and modern prejudices against undergraduate students with intellectual disability and effects of gender and university major on prejudices. Method: 189 students were selected through cluster sampling from University of Isfahan. They filled up the scale of classical and modern prejudice toward people with intellectual disability, developed by Akrami et al. (2006). Data analyzed through one sample t-test, and ANOVA test. Results: Results indicate that both forms of prejudice were prevalent in undergraduate students. Gender and university major had no relationship with prejudice toward people with intellectual disability, but more contact with people with intellectual disability was related to reducing in classical prejudice. Conclusion: According to the results of this study, more contact with intellectually disabled students has significant relationship with reducing the classical prejudice toward them