Irrational beliefs are improper solutions developed by the person himself for his personal problems. They occur in person's mind. These beliefs affect person's life. The purpose of this research is to investigate the effects of irrational beliefs on academic motivation and academic self-efficacy of students. Independent variable of the study is irrational beliefs. Dependent variables are academic motivation and academic self-efficacy. Survey method was used in the study. The sample of the study consists of 161 second and third year students attending at Sakarya University, Faculty of Education, Department of Computer and Instructional Technologies Education. It was found out that there were no differences between irrational beliefs of students in terms of gender. And we found positive relationship between irrational beliefs and academic motivation, and negative relationship between irrational beliefs and academic self-efficacy of students. At the end of the research some suggestions has been presented on irrational beliefs, academic motivation and academic self-efficacy. (C) 2015 The Authors. Published by Elsevier Ltd.