Abstract: A shaft member for hydrodynamic bearing apparatuses having higher dimensional accuracy produced at low costs and a method for producing the same are provided. Moreover, a shaft member for hydrodynamic bearing apparatuses having hydrodynamic grooves processed with high accuracy and a method for producing the same are provided without a large increase in the processing costs. A shaft material 10 integrally having a shaft portion 11 and a flange portion 12 is formed by a forging process, and the cylindricity of a part or the entire outer circumferential surface 11a of the shaft portion 11 is corrected. The end face 11b of the shaft portion of the shaft material 10 and the end face 12b of the flange portion 12 on the opposite side of the shaft portion are ground relative to the corrected face 13 mentioned above, and the outer circumferential surface 10b of the shaft material 10 is ground relative to these end faces 11b, 12b.