Objective : The purpose of this study is to analyze the origin plants and the characteristics of the origin-plants of Sang-San.

Method : To achieve the purpose of this study, bibliographies about Sang-San were examined. The examination was focused on the origin. Standing on this analysis the list and characteristics of the origin plants were presented.

Results :

1. RADIX DICHROAE is root of Dichroa febrifuga Lour.

2. At first, RADIX DICHROAE was belong to Orixa japonica Thunb which was used until 907-960. After that, it changed as what we call RADIX DICHROAE today.

3. Current RADIX DICHROAE has various of types in the market.

Conclusions : RADIX DICHROAE is root of Dichroa febrifuga Lour.

KeyWords : RADIX DICHROAE, Dichroa febrifuga Lour, Orixa japonica Thunb