this study aimed to investigate the psychometric properties and factor structure of the disruptive mood dysregulation disor der questionnaire in adolescents. the research design was descriptive and the participants included two samples of 291 and 286 people students of the middle school of kermanshah city in the 1398 99 academic year, selected by multistage clustersampling method and completed disruptive mood dysregulation disorder questionnaire (boudjerida & et al., 2022) and children’s depression scale (lang & tisher, 1987). after translating the questionnaire, exploratory factor analysis was used to examine the factor structure of the questionnaire, the results showed that there are 10 items in the form of two factors to measure disruptive mood dysregulation disorder. cronbach’s alpha and split half method was also used to evaluate the reliability, the results of confirmatory factor analysis confirmed the two factors of anger and aggression and irritability. the results of correlation with other tests also confirmed the convergent validity of the questionnaire. also, all cronbach’s alpha and split half coefficients indicated a high internal consistency of the factors. the results show that this questionnaire has very good validity and reliability and is effective in measuring disruptive mood dysregulation disorder in the two dimensions mentioned.