Introduction: Sleep is an important part of human life. Sleep disorders are very common and have direct and indirect impacts on other aspects of life. Detection of sleep disorders is very important and needs the appropriate tools. This study was aimed to determine the psychometric properties of questionnaire on sleep disorders. Materials and Methods: Using correlation statistical method, the sleep condition of 500 students from Garmsar University was evaluated by psychometric properties of the sleep questionnaire. Results: The reliability test using Cronbach's alpha was 0.79. Exploratory factor analysis for Validity revealed that 61% of the variance in scores of questions about sleep disorders could be explained by the scale. After varimax rotation, two major forms of sleep disorders, insomnia and hypersomnia, were identified. Confirmatory factor analysis of indicators of structural equation model for validity showed that the model is fitted to the data. Conclusion: This questionnaire can be used for measurement and screening of sleep disorders for both research and treatment proposes.