SLIDING BEARING, AND CRANKSHAFT SUPPORT STRUCTURE

A sliding bearing (40) comprises a first split bearing (41a) and a second split bearing (42a). A thickness (T2) of the second split bearing (42a) at a circumferentially central position (P2) is greater than a thickness (T1) of the first split bearing (41a) at a circumferentially central position. The thickness of the first split bearing (41a) is decreased from the circumferentially central position toward the circumferential end surfaces (51) of the first split bearing so that the circumferential end surfaces (51) of the first split bearing have a first thicknesswise dimension. The thickness of the second split bearing (42a) is decreased from the circumferentially central position toward the circumferential end surfaces (61) of the second split bearing so that the circumferential end surfaces (61) of the second split bearing have a second thicknesswise dimension. The first thicknesswise dimension and the second thicknesswise dimension are equal to each other.