Emotional autonomy is a psychological phenomenon which arising from basic psychological needs. It is needed to pay much attention to EMOTIONAL AUTONOMY during the transition to adulthood. The aim of the present study was to investigate psychometric properties of the Emotional Autonomy Scale (EAS; Steinberg & Silverberg, 1986; Beyers, Goossens, Van claster, & Duriez, 2005). Participants were 348 students of Shiraz University & Shiraz University of medical sciences and health services (213 girls & 134 boys). They were selected based on stratified-cluster sampling and completed the EAS. To investigate the construct validity of the questionnaire, measures of sampling adequacy were checked and those measures were satisfying. Then using chronbach’s alpha reliability of the whole scale & it’s subscales was assessed & it showed satisfying reliability. Some questions were omitted due to reliability reduction. In order to check the construct validity, CFA using AMOS version 20 and the maximum likelihood pattern was performed. Then, two theoretical models of emotional autonomy were compared. Finally, the results revealed that the two factor model, showed better goodness of fit indexes. At least, for better theoretical backgrounds, correlations between questions and the general scores was assessed. Almost all correlations were significant. Results revealed that the two-factor model is more accordant with Iranian undergraduate student sample. This article is finished with conclusion and discussion of the findings and some suggestions for the future research.