Abstract: Effects of elevated atmospheric CO₂ on CH₄ and N₂O emissions during the paddy rice-growing season were examined in a FACE (free-air carbon dioxide enrichment) study. The emission fluxes of CH₄ and N₂O from paddy rice fields were measured using methods based on static opaque-chamber and gas chromatography techniques. Synthetic fertilizer N was amended for the rice-growing season at two rates, 150 and 250kgN·hm^-2 and the atmospheric CO₂ was enriched by 200μmol·mol^-1. At both Nlevels, the preliminary results indicate that no significant effect of CO₂ enrichment on CH₄ and N₂O emissions from the rice paddy fields was detected. The result on CH₄ emissions is inconsistent with the most literatures, and the result on N₂O emissions is consistent with the most literatures.