This work is aimed at studying the potential of the reburning technology for reducing NOx emissions of a fluidized-bed combustor co-firing biomass fuels. Pelletized rice husk was selected as major (primary) fuel, whereas moisturized rice husk was used as reburn (secondary) fuel. The experiments were conducted at the fixed heat input of 200 kWth on a fluidized-bed combustor using silica sand as bed material. During the tests, energy fraction of the secondary fuel (EF2) was ranged from 0 to 0.25, total excess air (EA) and the secondary-to-total air ratio (SA/TA) were ranged from 20 to 80% and 0.1 to 0.4, respectively. The study revealed significant effects of EF2, EA, and ST/TA on the CO, CxHy, and NOx (as NO) emissions, and the combustion efficiency of the reactor. High (~99%) combustion efficiency is achievable when using both co-combustion methods. Compared to the conventional fluidized-bed combustion of pelletized rice husk, the proposed combustion method can reduce the NOx emissions roughly by 50%, while controlling the CO and CxHy emissions from the combustor at acceptable levels.