Boredom is a psychological phenomenon that was defined as an aversive state or incompatibility with every repetitive experience while the release of stability is not allowed. Boredom has several complications. So, the goal of this study is to compare the predictors of boredom in students of Arak University of medical sciences and Islamic Azad University. Materials and Methods: The current descriptive-comparative study has been done on966 students (from Arak University of medical sciences and

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... amic Azad University). The scale of current study was a checklist list of demographic information, predictors of boredom assess questionnaire, Farmer and Sundberg'boredom proneness scale. Data were analyzed by using chi-square, Pearson correlation, multivariate regression, and Fisher'sz. Results: The greatest number of students from both universities have normal boredom without a statistically significant difference between male and female students (p=0.06). University factor had the highest average between students. Totally, boredom had a significant correlation with each of the home (p=0.000) and society (p=0.001) factors. All three factors including home (p=0.033), university (p=0.033) and society (p=0.031) can explain and predict boredom in male and female students. Conclusion: The results showed that university factor was the most important factor for predicting boredom between college students. Thus, in order to avoid adverse effects of boredom on students educational activities, this phenomenon and its causes should be considered.