Livestock manure compost (LMC) can be used as an alternative nitrogen source instead of chemical fertilizerin order to reduce nitrous oxide (N2O) emission. To evaluate the effect of LMC on reducing N2O emission, wecultivated red pepper by treating with no treatment (Con), chemical fertilizer (CF), and the powder (LMCPD)and pellet type (LMCPE) of livestock manure compost for two years, and analyzed N2O emission and plantgrowth. The N2O emissions were 5.6 and 5.5 kg N2O ha-1 for the LMCPD and LMCPE treatments, respectively,which were lower by 48% than that of the CF treatment, 11.6 kg N2O ha-1. The yields of red pepper fruits ofLMC treatments were 70.8 - 94.7% of that of CF treatment, but the yields were not significantly (p > 0.05)different between CF and LMC treatments. The lower yields of LMC treatment were attributable to deficiencyof some other nutrients such as potassium (K) rather than nitrogen. Those results suggested that LMC cancontribute more positively to reducing N2O emission than to reducing red pepper yield.