The present study were aimed isolation and elucidation structure tamarixetin glycoside from bungo perak-perak (Begonia versicolar Irmsch) leaves. The result of this study are the flavonoids quercetin derivatives, tamarixetin 3- O-rhamnoglucoside. This compound were isolated and purificated by gel silica and sephadex LH-20. Purification of compound was tested by melting point test and elucidation structure of isolation result by spectrofotometer NMR (1H-NMR, 13C-NMR)