The effect of temperature on the particle entrainment rate was measured and discussed in a gas fluidized bed(0.1m in diameter, 2.1m high)which used sand as a bed material and was equipped with an electric heater. The particle size(0.075-0.425mm). gas velocity(0.65-2.3m/s)and bed temperature(20-600℃) were varied as experimental variables. The particle entrainment rate increased very slowly with the bed temperature at the gas velocity less than 0.8m/s. At the gas velocity greater than 1m/s, the particle entrainment rate decreased with increasing the bed temperature until a certain temperature above which the particle entrainment rate increased with the bed temperature. The minimum point of particle entrainment rate shifted to higher temperature with increasing gas velocity. the change of the particle entrainment rate along the bed temperature was same as that of the particle size whose terminal velocity was equal to the gas velocity.