Tapered roller bearing

A tapered roller bearing comprising:

• an inner ring having, on an outer peripheral side, a conical inner raceway surface with a diameter increasing from an axially first side toward an axially second side;
• an outer ring having, on an inner peripheral side, a conical outer raceway surface with a diameter increasing from the axially first side toward the axially second side;
• a plurality of tapered rollers provided in an annular space formed between the inner ring and the outer ring and configured to roll on the inner raceway surface and the outer raceway surface;
• and
• an annular cage that holds the tapered rollers, wherein:
• the cage has a small annular portion positioned toward the axially first side with respect to the tapered rollers, a large annular portion positioned toward the axially second side with respect to the tapered rollers, a plurality of cage bars that couples the small annular portion and the large annular portion together, and pockets that are formed between the small annular portion and the large annular portion, and between the cage bars adjacent to each other in a circumferential direction such that the tapered rollers are each housed in a respective pocket,
• the cage is configured to contact an inner peripheral surface of the outer ring to be positioned in a radial direction,
• the small annular portion is provided with introduction channels through which lubricant is enabled to be introduced from a bearing exterior on the axially first side into the annular space,
• the introduction channels are present only in the small annular portion, and
• circumferential positions of the introduction channels coincide with circumferential positions of the pockets.