Objectives : The aim of this study was to survey the usage frequency of Sasang constitutional herbal formula in the clinlcal field. Methods : We searched the case report forms from 2031 subjects in the 11 oriental hospitals and 10 oriental clinic. Subjects were diagnosed by the Sasang Constitution specialist in oriental hospital, who had remarkable improvement in their chief complain after Sasang Constitution medication. We counted the usage frequency of each constitutional herbal formula. Results and Conclusions : In TE type, Cheongsimnyeonja-tang, Yeoldahanso-tang, Jowiseungcheong-tang, Taeeumjowi-tang were used in high frequency. In SE type, various herbal formula were used in a similar frequency. In SY type, Yanggyeoksanhwa-tang, Hyeongbangjihwang-tang, Dokhwaljihwang-tang were used in high frequency. Additionally, the use of specific herbal formula was concentrated in SY type.