TAPERED ROLLER BEARING

To provide a tapered roller bearing capable of stabilizing an attitude of a retainer and capable of suppressing vibration and noise.SOLUTION: A tapered roller bearing 1 includes inner and outer rings 11, 12, a plurality of tapered rollers 15 interposed between the inner and outer rings 11, 12, and a retainer 17 for retaining the tapered rollers 15. The retainer 17 includes a plurality of retainer segments 20 annularly arranged. Each of the retainer segments 20 has a pocket for holding the prescribed number of tapered rollers 15. Each of the retainer segments 20 includes a plurality of pillars extending in an axial direction, and a pair of connecting portions extending in a circumferential direction and connecting the plurality of pillars respectively. A protrusion 29 protruding to a radial outer side and extending in the circumferential direction is provided on both ends in the axial direction of the retainer segment 20, and each of the protrusions 29 has a guide surface 29a guided to an outer ring raceway surface 14.SELECTED DRAWING: Figure 1 【課題】保持器の姿勢を安定化し、振動および騒音を抑制することができる円すいころ軸受を提供する。【解決手段】円すいころ軸受１は、内外輪１１，１２と、内外輪１１，１２間に介在される複数の円すいころ１５と、円すいころ１５を保持する保持器１７とを備え、保持器１７が環状に配列された複数個の保持器セグメント２０を含む。各保持器セグメント２０は、定められた数の円すいころ１５を保持するポケットを有する。各保持器セグメント２０は、軸方向に延びる複数の柱部と、周方向に延びて複数の柱部をそれぞれ連結する一対の連結部とを備える。保持器セグメント２０の軸方向両端部に、径方向外方に突出し且つ周方向に延びる突起２９が設けられ、各突起２９は、外輪軌道面１４に案内される案内面２９ａ有する。【選択図】図１