For the investigation of resources in Codonopsis species, the studies were carried out to evaluate the pharmaco-constituents from the leaves of Codonopsis lanceolata (Campanulaceae) whose roots have been used to antitussive, expectorant, detoxicate, tonic, edible, etc. as a folk medicine in Korea. From the EtOAc and BuOH fractions of MeOH extract, three flavonoid compounds, $luteolin-7-O-{eta}-_D-glucopyranoside$$(C_{21}H_{20}O_{1i},;mp;254{sim}255^{circ}$, compound 1), $luteolin-5-O-{eta}-_D-glucopyranoside$$(C_{21}H_{20}O_{1i},;mp;279{sim}281^{circ}$, compound 2) and luteolin $(C_{15}H_{10}O_6,;mp;327{sim}330^{circ}$, compound 3) were isolated and identified on the basis of their physicochemical properties and spectroscopic evidences(UV, IR, $^1H-NMR$, $^{13}C-NMR$, MS etc.) in comparison with authentics respectively.