Objectives : This study was done for comparing the result of Sasang constitution diagnosis using portable Ryodoraku and that of self-report questionare for Sasang constitution classification II QSCC II. Methods : We investigated 41 cases to collect the data. we analyzed the result of portable Ryodoraku and self-report(QSCC II). Results : 1. The degree of agreement between those results from portable Ryodoraku and QSCC II was statistically significant. 2. The dgree of agreement between those results from portable Ryodoraku and QSCC II was statistically significant in male and female. Conclusions : It is suggested that portable Ryodoraku should be available for diagnosing Sasang constitution.