To provide a screw transport apparatus for powder and grain simple in structure, manufactured at a comparatively low cost, and capable of simplifying maintenance, easily coping with a trouble such as biting of powder and grain and exhibiting excellent transport function.

A transport pipe 1 is fitted to the lower part of a hopper HP for putting powder and grain therein, and a spiral spring 11 is fitted to the periphery of a screw rotating shaft 6 mounted in the internal axial direction of the transport pipe 1 to be rotatable integrally with the shaft.