Patent ID: 8167503

Claim:
A taper roller bearing, comprising: an inner race; an outer race; a plurality of taper rollers arranged so as to be rollable between the inner race and the outer race; and a retainer for retaining the taper rollers at predetermined circumferential intervals, wherein the inner race includes a flange portion provided only on a radially larger side of a radially outer surface of the inner race, for guiding the taper rollers, wherein the retainer comprises: a radially-larger-side annular portion having a hook portion capable of being hooked to the flange portion of the inner race; a radially-smaller-side annular portion; and a brace portion coupling the radially-larger-side annular portion and the radially-smaller-side annular portion with each other, wherein the hook portion has a flat-plate shape, has a flat surface at a radially-larger-side thereof, and has, at a radially inner end portion, a guide surface portion for guiding the inner race, and wherein the guide surface portion is a tapered surface such that a thickness of the radially inner end portion is reduced towards an axial inner side.