A tapered roller bearing according to the invention is such that the
surface hardnesses of a raceway surface of an inner ring and rolling
contact surfaces of tapered rollers are set to 63 to 69HRC. In addition,
respective raceway surfaces of an outer ring and the inner ring and the
rolling contact surfaces of the tapered rollers are crowned and are set
such that a total crowning amount is 50 .mu.m or larger, an outer
crowning rate is 40% or larger and a roller crowning rate is 20% or
smalled.