Silica gel column chromatography of the ether extract of the root of Angelica Koreana $M_{AXIMOWICZ}$ (Umbelliferae) gave five kinds of crystalline products of coumarin. The following kinds of furocoumarins were identified by UV, IR, NMR spectra and physico-chemical tests. iso-imperatorin m.p. 108-$109^{circ}$ $C_{16}H_{14}O_{4}$ oxypeucedanin m.p. 142-$143^{circ}$ $C_{16}H_{14}O_{5}$ prangolarine m.p. 104-$105^{circ}$ $C_{16}H_{14}O_{5}$ imperatorin m.p. 100-$101^{circ}$ $C_{16}H_{14}O_{4}$ These analyses also showed that white needles m.p. 129-$130^{circ}$ were likely to be a furocoumarin. Besides, the methanol extract of the root was found to contain sucrose.