From the methanołic extract of the herb Ecballium elaterium two flavonoid compounds were isolated by employing preparative chromatography on cellulose, polyamide and Sephadex LH-20. They were identified by classical methods (m.p., hydrolysis) and spectroscopic methods (UV, FD-MS, 'flNMR, 13CNMR). In this way compound 1 was identified as 3-galactosyMiamnosyl glucoside quercetin (probably structure) and compound 2 as rutin. The rutoside content of the plant material (0,58%) was determined by HPLC.