Plug flow fluidized bed can be applied for continuous operation of rough rice drying. Novel fluidized bed technology enables drying of rough rice and dedusting / dehusking to be carried out simultaneously in plug flow fluidized bed. This paper reports the study of the effect of superficial gas velocity and inclination angle of distributor plate on rough rice flowability in inclined distributor plate plug flow fluidized bed as well as the efficiency of dedusting / dehusking. Experimental works had been carried out using rough rice (Group D particles) in a 2.5m height inclined fluidized bed column of cross sectional of 0.61m x 0.15m. The result showed superficial gas velocity has to be exceeds rough rice’s minimum fluidization velocity (at least 1.55 mf u for the case of rough rice) in order to ensure a smooth flow of rough rice on the inclined plate. At superficial gas velocity lower than minimum fluidization velocity, particles flow was not consistent. The bed of rough rice started to flow only when the effective weight of the bed of rough on inclined distributor overcomes the total friction between particles and particle-surface. On the other hand, dedusting / dehusking separation efficiency at low superficial gas velocity (approximately 1 mf u ) gave unsatisfactory separation of merely 40% of rice husk. At higher superficial gas velocity at 1.5 mf u , separation efficiency of rice husk as high as 93% was achieved. In addition, higher distributor inclination angle gave slightly improved separation efficiency.