Pericarp of Zanthoxylum coreanum Nakai have been used as a crude medicine for the treatment of ozena, rheumatoid, nasal sinusitis, meno-xenia, dyspepsia, toothache, sore throat, pains in the limbs, etc. in Korea. A sterol fraction and two compounds, compound I and II were isolated from the roots, stems, leaves of Zanthoxylum coreanum Nakai. The sterol fraction was identified as a mixture of ${eta}-sitosterol$ and campesterol. Compound I, colorless prismatic crystals, $C_{13]H_{13}NO_4$, mp. $175{sim}177^{circ}$, was proved to be skimmianine which is one of the alkaloids and compound II, $C_{14}H_{28}O_2$, mp. $53{sim}55^{circ}$, white powdered crystals was identified as myristic acid.