Provided is a sliding bearing that has a bearing inner peripheral surface covered by a resin overlay layer configured from a binder resin and a solid lubricant and/or hard substance, reduces the running-in time during an operation start, and can obtain the effect of increasing wear resistance and the effect of reducing friction. In the sliding bearing (1), halved members (2, 2) resulting from halving a cylinder parallel to the axial direction are disposed at the top and bottom, the inner peripheral surfaces of the top and bottom halved members (2) are covered by a resin overlay layer (2a) configured from a binder resin and a solid lubricant and/or hard substance, and a fine groove (3) is provided to an axial-direction end of the bottom halved member (2) in the peripheral direction from the mating surface at the downstream side in the rotational direction to a predetermined bearing angle.