The kinetics of sawdust pyrolysis in the temperature range from 300 to 600 degrees C has been measured. A thermogravimetric analyser was applied for the temperature range from 300 to 450 degrees C while for measurements in the temperature range from 450 to 600 degrees C, an entrained flow reactor has been used. The kinetic expression that describes the mass loss of sawdust due to pyrolysis is assumed to be of a single first-order in the unconverted wood. The first-order rate constant obtained from measurements in both the thermogravimetric analyser and the entrained flow reactor can be described by an Arrhenius equation with k(0) = 1.4 10(10) kg.kg(-1).s(-1) and E(a) = 150 KJ.mol(-1).