For the purpose of developing Korean Herbaolgy with the plants of Umbelliferae which grow wild and is planted in Korea, the these and writings on herbalogy, from literature of successive generations, have been thoroughly investigative and the results obtained were as follows : 1. There were totaled to 34 genera and 95 species in Korea and among them medicinal plants are 23 genera, 49 species, some 52 % in total but, the number of species may be added because of the similiar plants. 2. According to the oriental names which can be used for medical purpose, the medicinal plants belonging to the Umbelliferae family were classified as Radix 20, Fructus 8, Herba 7, Rhizoma 3, Foilum and Flos 2. Thus it was noticed that Radix was the main kind. 3. According to sum of 95 species in Umbelliferae family, they were classified into Angelica genera 23, Bupleurum genera 8, Peucedanum genera 7, Hydrocotyle genera 6. Thus it was noticed that Angelica genera was the main kind, some 24 % in total. 4. According to the number of species of the origin plants about each chinese materia medicals, they were classified into RADIX BUPLEURI 6, HERBA HYDROCOTYLEI 4, and RADIX ANGELICAE GLGANTIS·RADIX LIGUSTICI TENUISSIMAE·RADIX ANGELICAE DAHURICAE·FRUCTUS TORILIS 3 each. Thus the origin plants was not complexed reletively. 5. According to nature and flavour of medicinal plants, they were classified into warmth, heat : 19 each, cold, cool : 9 each, balance 1 and unidentified 8. Thus it was noticed that warmth and heat is the main in nature and flavour of medicinal plants. 6. According to the Properties and Principal curative action, they were classified into Drugs for diaphoretics or drugs for treating exterior symptom-complex 7. Drugs for relieving pain 6, Antirheumatics, Drugs which have tonifying actions for the treatment of deficiencies of Yin, Yang, Qi and blood and therefore can be classified into four groups 4, Febrifugal and detoxicant drugs 3, Diuretics and hydragogues. Antitussives 2 each. Thus it was noticed that Drugs for diaphoretics or drugs for treating exterior symptom-complex was the main kind. 7. Comparing to whole medicinal plants 49 kinds, toxic durgs include minor toxin were 2 kinds, 4 % of the whole. Thus toxic durgs were rare. From this result, It was revealed that the plants for medical purpose in Umbelliferae was 52 % of the whole, in which RADIX was mostly abundunt and toxic plants was so rare that it will be used for clinical treatments more easily. It is considered that many experiments and clinical approaches must be continued to use Umbelliferae plants widely.