Objectives : The purpose of this study was to evaluate the psychological characteristics of Sasang Constitutions by MBTI(Myers-Briggs Type Indicator). Methods : This study was carried out on 154(101/53) of Oriental Medical College at Kyunghee University. After determining the Sasang Constitutions(Soeumin, Soyangin, Taeumin) by QSCC II, the psychological characteristics of each group were analysed by MBTI. Results : 1) The findings show that there are 72.7% of agreement in discriminant analysis by MBTI question item for differentiating among Soeumin, Soyangin and Taeumin. 2) The findings show that there are 57.9% of agreement in discriminant analysis by MBTI score for differentiating among Soeumin, Soyangin and Taeumin. 3) Soeumin group showed more preference for Introversion. 4) Taeumin group showed more preference for Sensing. 5) Soyangin group tended to be Intuition, Perception types. Conclusion : The results show that there are significant relationships between Sasang Constitutions and MBTI psychological types. The findings indicated that MBTI could be useful tool to understand psychological characteristics of Sasang constitutions.