A fluid dynamic bearing apparatus includes shaft member 2, housing 7, sleeve portion 8, and sealing portions 9, 10. The housing 7 includes a straight cylindrical inner circumferential surface with a constant diameter and openings at both axial ends thereof. The sleeve portion 8 is provided separately from the housing 7 and fixed to the inner circumferential surface of the housing 7. A radial bearing gap is formed between the inner circumferential surface 8a of the sleeve portion 8 and the outer circumferential surface 2a of the shaft member 2 , and thrust bearing gaps are formed between the end faces 9b, 10b of the sealing portions 9, 10 and the end faces 8b, 8c of the sleeve portion 8 opposing these to support the shaft member 2 in a non-contact manner in the radial direction and in the thrust direction by the hydrodynamic effect of a lubricating oil produced in each bearing gap.