fluid dynamic bearing device 1 accordingly an axial interval between the radial bearing portions r 1 and r 2 is increased whereby bearing rigidity in the radial direction can be enhanced further due to the fact that the wedge like space g is provided between the upper end surface 10 b 3 of the fixing portion 10 b of the lid member 10 and the step portion 7 f of the housing 7 adhesive of the inner fixed portion b can be drawn into the inner fixed portion b side by a capillary force even if the adhesive leaks to this space g further a capacity of the space g can be ensured to be large through expanding the axial interval toward the radially outer side and accordingly the space g functions as an adhesive pocket between the bracket 6 and the fluid dynamic bearing device 1 and the fixing force therebetween can be enhanced note that such an effect can also be obtained in such a manner that the step portion 7 f of the housing 7 is formed to be flat and that the upper end portion of the fixing portion 10 b of the lid member 10 is formed into a taper shape gradually expanded downward in diameter incidentally for example in the case of arranging the upper end portion of the inner fixed portion b within an axial range of the lower side radial bearing portion r 2 then among the housing 7 a portion smaller diameter outer peripheral surface 7 e adhered and fixed to the lid member 10 and a portion step portion 7 f facing.