A tapered roller bearing , comprising: an inner ring comprising a raceway surface having a tapered shape on an outer periphery; an outer ring comprising a raceway surface having a tapered shape on an inner periphery; a plurality of tapered rollers incorporated into a space defined between the raceway surfaces ; and a retainer configured to receive the plurality of tapered rollers , wherein the raceway surface of the inner ring or both raceway surfaces of the inner ring and the outer ring comprise cut crowning of a complex curve comprising: a center curve (C1), which is formed at a center portion in a generating line direction of the raceway surface ; and end portion curves (C2), which are formed on both sides of the center curve (C1) in the generating line direction and each have a curvature radius smaller than a curvature radius of the center curve (C1), wherein the tapered rollers each have a rolling surface comprising: a straight portion , which is formed at a center portion in a generating line direction of the rolling surface ; and logarithmic crowning portions , which are formed on both sides of the straight portion in the generating line direction, characterized in that when the raceway surface of the inner ring has an effective raceway surface width represented by LG, and the straight portion of the rolling surface of the tapered roller has a width represented by LW1, 0.7≤LW1/LG<0.95 is satisfied, and in that when the logarithmic crowning portion has a drop amount represented by Dr, the tapered roller has a diameter represented by Dw, and the cut crowning of the raceway surface of the inner ring has a drop amount represented by Dc, 0.003≤(Dr+Dc)/Dw≤0.03 is satisfied. an inner ring comprising a raceway surface having a tapered shape on an outer periphery; an outer ring comprising a raceway surface having a tapered shape on an inner periphery; a plurality of tapered rollers incorporated into a space defined between the raceway surfaces ; and a retainer configured to receive the plurality of tapered rollers , wherein the raceway surface of the inner ring or both raceway surfaces of the inner ring and the outer ring comprise cut crowning of a complex curve comprising: a center curve (C1), which is formed at a center portion in a generating line direction of the raceway surface ; and end portion curves (C2), which are formed on both sides of the center curve (C1) in the generating line direction and each have a curvature radius smaller than a curvature radius of the center curve (C1), a center curve (C1), which is formed at a center portion in a generating line direction of the raceway surface ; and end portion curves (C2), which are formed on both sides of the center curve (C1) in the generating line direction and each have a curvature radius smaller than a curvature radius of the center curve (C1), wherein the tapered rollers each have a rolling surface comprising: a straight portion , which is formed at a center portion in a generating line direction of the rolling surface ; and logarithmic crowning portions , which are formed on both sides of the straight portion in the generating line direction, a straight portion , which is formed at a center portion in a generating line direction of the rolling surface ; and logarithmic crowning portions , which are formed on both sides of the straight portion in the generating line direction, characterized in that when the raceway surface of the inner ring has an effective raceway surface width represented by LG, and the straight portion of the rolling surface of the tapered roller has a width represented by LW1, 0.7≤LW1/LG<0.95 is satisfied, and in that when the logarithmic crowning portion has a drop amount represented by Dr, the tapered roller has a diameter represented by Dw, and the cut crowning of the raceway surface of the inner ring has a drop amount represented by Dc, 0.003≤(Dr+Dc)/Dw≤0.03 is satisfied. <EOS>