A sliding bearing (1) has an outer ring (2), an inner ring (3), an annular-shaped track (4) formed between the two rings, and a sliding solid (5) mounted on the track (4). The track (4) has a rectangular cross-section or a rhomboid cross-section formed from an outer-ring-side V groove (11) and an inner-ring-side V groove (12). The sliding solid (5) comprises, e.g., an endless coil spring, and theouter peripheral surface of the circular contour thereof is in contact in a four-point contact state with four first through fourth track surfaces (6-9) of the track (4). A sliding bearing having a compact configuration that can bear a moment load can be achieved.