To provide a workpiece feeding device capable of feeding workpieces with cross section shapes changed along the longitudinal direction while preventing deformation and damage etc. and capable of being used for various purposes even if types of target workpieces are different.

This workpiece feeding device is equipped with a first rotating body 10 having a rotation group 12 formed by laminating a plurality of thin plate-shaped rotating boards 2, a second rotating body having an integrally formed roller, and a motor driving the first rotating body 10. Each of the rotating boards 2 is formed by penetrating through a spiral hole part 4 around a first rotating shaft. Due to the elastic deformation, an arbitrary point on the outer peripheral edge of each of the rotating boards 2 can be displaced in the diametrical direction and circumferential direction.