This study aimed at figuring out the relations on Sasang Constitutions, and personality traits. Four hundred fourteen university students were tested by, QSCCII, NEO-Pl-R Korean version. It is analyzed by ANOVA and Duncan post hoc multiple comparisons with Spss 9.0. Following questions should be answered in this study. Are they any differences in the personality traits in accordance with Sasang Constitutions? The result of this study are follows; It is ascertained to find out personality trait by Sasang Constitutions. In other word, they have differences in personality traits(factor of N: Neuroticism, E: Extroversion, C: Conscientiousness) in accordances with Sasang constitutions by QSCCII.