Tapered roller bearing

A tapered roller bearing comprising:

• an outer ring including an outer-ring raceway surface around an inner circumferential surface;
• an inner ring arranged on an inner side relative to the outer ring, the inner ring including an inner-ring raceway surface around an outer circumferential surface and a larger flange surface arranged on a larger diameter side relative to the inner-ring raceway surface;
• and
• a plurality of tapered rollers disposed between the outer-ring raceway surface and the inner-ring raceway surface, each tapered roller including a rolling surface in contact with the outer-ring raceway surface and the inner-ring raceway surface and a larger end face in contact with the larger flange surface,
• the plurality of tapered rollers including a nitrogen enriched layer formed on a surface layer of the rolling surface,
• a distance from an outermost surface of the surface layer to a bottom of the nitrogen enriched layer being not shorter than 0.2 mm, wherein
• in each tapered roller of the plurality of tapered rollers, T2 is smaller than T1 and T2 is smaller than T3, where T1 represents a distance at a first measurement point which is a boundary point between a chamfered portion of the tapered roller and a crowned portion where crowning is formed in the rolling surface of the tapered roller, T2 represents a distance at a second measurement point which is a position at a distance of 1.5 mm from a smaller end face of the tapered roller, and T3 represents a distance at a third measurement point at a center of the rolling surface of the tapered roller.