The design, construction, and operation of a bench-scalefluidized-bed pyrolysis system for the production of bio-oilusing fast pyrolysis have been described. The designed reactorexhibited stability of operation for sawdust pyrolysis andshowed reasonable repeatability of the experiments, achieving abio-oil yield of 62%, which was 18% greater than the highestbio-oil yield that we previously obtained using a pyrolysis fixed-bed reactor at the same temperature. The produced char in thefluidized-bed system was almost 8% less than that of the fixed-bed system at temperatures greater than 475 °C. The bio-oilcollected in the condensers, both metal and glass, had a heatingvalue less than that of sawdust. The bio-oil had a specific gravityof about 1200 kg/m3, which was 6 times greater than that offeedstock (200 kg/m3). The bio-oil collected in the metal andglass condensers had a higher percentage of acetic acid, ketones,and water content compared to the thick oil collected in theimpinger trap, which contained a higher percentage of phenols.A low ash content in the produced bio-oils proved that the charseparation system was very efficient. The produced char with arelatively high heating value had potential to be used as a sourceof process heat