This small research in order to find out the effect of one of various methods to breakdown seed dormancy, soaking seed in warm water, on two main processes of the seed which are metabolism processes (respiration rate, ethylene production, and α-amylase activity) and germination rate. The result of this experiment showed that soaking seed in warm water at 500C in 15 minutes period not only effectively enhanced germination rate together with enhance respiration rate, ethylene production and α-amylase activity but also limited fungus infection during germination of rice seed. So far, a further research on methods to breakdown seed dormancy such as scarification and chemical methods is needed.