The phytochemical study of Cacalia koraiensis Nakai (Compositae) led to the isolation of eight compounds, $eta$-sitosterol (1), stigmasterol (2), phytol (3), $eta$-sitosterol-3-Ο-glucopyranoside (4), adenostylol (5), campesterol (6), germacradien-4$alpha$-ol (7), and quercetin-3-rhamnoside (8). Their structures were established by chemical and spectroscopic methods. The cytotoxicity of the isolated compounds was evaluated by SRB assay against five cultured human tumor cell lines.