A study of 2 cultivation methods; transplanting and broadcast and 3 organic matter amendment; fresh rice straw, burnt rice straw and green manure (mung bean), on methane emission of paddy rice cv. Supanburi 1 was conducted. The design used in this experiment was 2(+,ด)3 Split Plot in Randomized Complete Block. Each week, the emitted methane concentration of the field was monitored by Static Box technique and then analyzed by Gas Chromatography (GC/FID). The result showed that soil amendment by adding fresh rice straw could enhance the soil nitrogen and soil amendment by using green manure could increase to the highest of soil organic matter. The result also showed that the two cultivation methods did not effect soil nutrient. However, transplanted rice incorporated with fresh rice straw amendment had the highest methane emission. Added fresh rice straw resulted in 1.4 times of higher methane emission than burnt rice straw and green manure. On the other hand, the methane emission of broadcast technique was not in agreement with transplanting. It was also found that rice grown by broadcast method with burnt rice straw emitted a higher methane than with fresh rice straw and green manure amendments. It is interesting to note that broadcast technique resulted in 2 times less of methane emission than transplanting. In transplanting field, the more shoot height and root depth, the less methane emission. Although there were not having any relation of shoot height and root depth on methane emission of broadcast field, there were a good positive relation between root dry weight and the methane emission.