Patent ID: 7350978

Claim:
A taper roller bearing comprising: an outer ring that has a raceway surface at an inner periphery thereof; an inner ring that has a raceway surface at an outer periphery thereof; a retainer that is arranged between the outer ring and the inner ring, includes a smaller diameter annular portion and a large diameter annular portion and is formed with pockets by connecting the small diameter annular portion and the large diameter annular portion by a plurality of column portions having a linear shape; and taper rollers that are arranged between the raceway surface of the outer ring and the raceway surface of the inner ring and contained in the pockets, wherein an end face on an outer side in a radial direction of the small diameter annular portion of the retainer is disposed on an inner side in the radial direction of a pitch conical face of the taper roller and an end face on an inner side in the radial direction of the large diameter annular portion is disposed on an outer side in the radial direction of the pitch conical face of the taper roller.