To provide a sliding bearing capable of shaping its exterior surface side without using an outer mold which is divided into sections corresponding to the number of slits to be shaped by the outer mold and facilitating manufacturing and reducing cost.

The sliding bearing 1 comprises a bearing body 11, slits 14 and 15 extended from one end face 12 in the axial direction A of the bearing body 11 to the other end face 13 in the axial direction A of the bearing body 11, slits 16, 17, and 18 extended from the other end face 13 of the bearing body 11 to one end face 12 of the bearing body 11, a sliding surface 19 which is formed inside the bearing body 11 and partially partitioned by the slits 14 to 18, mounting grooves 21 formed on the outer surface 20 of the bearing body 11, and elastic rings 22 which are radially projected outwardly from the outer surface 20 of the bearing body 11 and fitted into the mounting grooves 21 so as to contract the diameter of the bearing body 11.