To evaluate the effects of percolation rate of paddy soil and drainage condition on greenhouse gas emission from paddy fields, CH4 and N2O emission amounts were measured in paddy field having different percolation rate as 6.1mm/d, 7.4mm/d and 11.9mm/d and drainage conditions as a tile drainage system and a conventional drainage system in Milyang, South Korea. As the percolation rates of paddy soil were increased, the CH4 amounts in soil water were decreased and N2O were increased; however, the emission amounts from paddy fields in both CH4 and N2O gases were deceased. The reason that the N2O emission decreased from paddy soil might be the produced N2O in soil water was dissolved and leached by fast percolation rate of soil. Of drainage conditions, the tile drainage system promoting water percolation rate of paddy field reduced CH4 emission amount of 39~40% and N2O amount of 33~35% from paddy soil compared with conventional drainage. So, tile drainage was proved prospective cultural practice in view of not for alternation of land usage and rice yield but for reduction of GHG emission especially in poorly drainage soil.