Background: Aside from test anxiety scales, measurement instruments assessing students’ achievement emotions are largely lacking. Therefore, the main purpose of the present study was to investigate factorial validity of the Class- Related Emotion Scales (CRES) among Iranian university students.Method: 400 university students (240 male, 160 female) completed the Class- Related Emotion Scales. The confirmatory factor analysis method and internal consistency were used to compute the CRES's factorial validity and reliability, respectively.Results: The results of confirmatory factor analysis, based AMOS software, indicated that multidimensional structure of the CRES consisted enjoyment, hope, pride, anger, anxiety, shame, hopelessness and boredom had acceptable fit to data in the Iranian sample. The results of the confirmatory factor analysis by replication multidimensional factorial structure of the Farsi version of the CRES consisted of 8 scales measuring enjoyment, hope, pride, anger, anxiety, shame, hopelessness, and boredom during class indicated that the scales were internally valid. Internal consistencies for the scales measuring enjoyment, hope, pride, relief, anger, anxiety, shame, hopelessness, and boredom during class were 0.93, 0.92, 0.89, 0.89, 0.89, 0.91, 0.93 and 0.95, respectively.Conclusion: In sum, on the one hand, the results provide further support for the control- value theory and on the other hand, these findings provide evidence for the validity and reliability of the AEQ as an instrument to measure of achievement emotions among Iranian university students.