To provide a sawdust drying device capable of stably discharging sawdust accumulated in a sawdust drying bin without interrupting the discharge as a result that the travel of a discharge auger is stopped with the resistance of the sawdust.

The sawdust discharge auger 6 is placed on a perforated ventilating floor surface 2 for circulating on the perforated ventilating floor surface 2 with a center (a) of the bin as a supporting point. On the upper inner wall face of the bin, a drive 11 is provided for circulating and traveling on a frame 21 with the center (a) of the bin as the supporting point. The drive 11 and the sawdust discharge auger 6 are connected to each other via a rod 12. As the drive 11 travels, force of pressing down a wheel block 9 of the sawdust discharge auger 6 and force of pushing it in the moving direction operate via the rod 12 at the same time so that the sawdust discharge auger 6 can surely circulate on the upper face of the perforated ventilating floor surface 2 without riding on sawdust to smoothly discharge the sawdust.