Free radical scavenger capacity of the polyphenolic fractions obtained from ethyl acetate extracts of the seeds of sixteen red or white-colored samples of grape (Vitis vinifera-Vitaceae) species cultivated in Turkey has been determined in this study. On this purpose, the scavenger activity of V. vinifera extracts was evaluated via stable free radical 1,1-diphenyl-2-picryl hydrazyl (DPPH .) and superoxide radical (O2-.) generated by xanthine/xanthine oxidase (XOD) system. DPPH. scavenger capacity of the extracts has been compared with the same concentrations of the known antioxidants such as BHT, vitamin C, gallic acid and quercetin. Vitamin C and gallic acid have been also used to compare O2-. scavenger capacity of the extracts. Most of the extracts displayed significant DPPH. scavenger activity.