Taxonomic studies based on morphology and anatomy were conducted to investigate interspecific relationships and to reexamine five taxa of the genus Pimpinella in Korea. Morphological differences were observed among species in the degree of leaf cleft and presence or absence of radical leaf at full grown adult. The anatomical characters of stem, leaf and fruit were also described. Especially morphological characters of petioles and pedicel were different among species. According to the above observations of P. koreana, it should be synomized as P. brachycarpa. Also, P. koreana var. uchiyamana was treated as a variety of P. brachycarpa and P. hallaisanensis was described as a new species. In conclusion, the Pimpinella in Korea was three species with two varieties, excluding P. calycina which were not investigated in this study.