A fluid bearing apparatus according to a preferred embodiment of the present invention includes a shaft arranged to extend along a central axis extending in a vertical direction; a rotating portion arranged opposite to an outer circumferential surface of the shaft, and arranged to be capable of rotating about the central axis with respect to the shaft; a lubricating oil arranged in a gap between the rotating portion and each of upper and lower outer circumferential surfaces of the shaft; a first groove defined in at least one of a middle outer circumferential surface of the shaft and a portion of an inner circumferential surface of the rotating portion, the portion being opposite to the middle outer circumferential surface, the first groove being arranged to extend along a circumferential direction; a plurality of second grooves each of which is defined in an upper surface of the rotating portion; and a plurality of communicating holes each of which is defined in the rotating portion, and is in communication with the first groove and a corresponding one of the second grooves.