Purpose: This study was conducted to investigate the reproducibility of responses to the QSCC II. Methods: Subjects have been tested by QSCC II for 2 or 3 successive years in Kangnam Korean Hospital at Kyunghee University from January 2002 to December 2005. We analyzed constitutions of the same subjects of each year tested. Results: In the second year of QSCC II assessment, 333 of the total 584 subjects were classed as the same constitutions as in their first test. The reproducibility was thus 56.88%. After the third year of QSCC II, 45 of a total 81 subjects were in the same constitutions. The reproducibility was thus 55.56%. Conclusions: We have found that the reproducibility of QSCC II is about 56%, so there is a severe limitation to diagnosis of constitution by QSCC II. Therefore, we must analyze constitutions through multiple objective methods.