Impostering syndrome which is now interpreted as successful people disorder, is indeed a vicious cycle of negative emotions about something that the person has gained in his way to success. Imposters internalized the failure, they experience less gratification and satisfaction than non-imposters, these are the effective consequences of failure in people with low self-concept too. The present study was aimed at investigating the relationship of impostering with self-concept among M.A./M.SC. non-medicine male and female students of Tehran university in the four main branches of humanities, sciences, technical engineering, and art were selected through a stratified random method. In so doing, 400 students (218 boys and 182 girls) completed the imposter syndrome scale of Clancy (1978), and the 10-item self-concept scale of Pourhossein. The results of the study indicated that there was a significant relationship between a high level of impostering and a significant negative correlation with self-concept. but about t-test indicated no significant correlation between imposter and self-concept in different gender groups. Also results indicated that high level of imposter correlation with down level self-concept, and imposters had poorer self-concept and there is no difference between female and male students regarding the self-concept and imposter.