A sliding component comprising: a pair of sliding parts (3, 5) having sliding faces to slide relative to each other, one of an inner peripheral side and an outer peripheral side of the sliding parts (3, 5) is a high-pressure fluid side and the other of the inner peripheral side and the outer peripheral side of the sliding parts (3, 5) is a low-pressure fluid side, one of the sliding faces being provided with dimples (10, 20, 30, 40), wherein each dimple (10, 20, 30, 40) includes an upstream cavitation formation region (10a, 20a, 30a, 40a) disposed close to the low-pressure fluid side, a downstream positive pressure generation region (10b, 20b, 30b, 40b) disposed close to the high-pressure fluid side, and a connection region (10c, 20c, 30c, 40c) connecting the upstream cavitation formation region (10a, 20a, 30a, 40a) on the downstream side and the downstream positive pressure generation region (10b, 20b, 30b, 40b) on the upstream side, wherein a positive pressure relief groove (15, 25, 35, 45) is provided at a distal end (20d, 40d) of the downstream positive pressure generation region (10b, 20b, 30b, 40b) in a manner connecting the downstream positive pressure generation region (10b, 20b, 30b, 40b) and the high-pressure fluid side, characterized in that each dimple (10, 20, 30, 40) has a crank shape, and the positive pressure relief groove (15, 25, 35, 45) has a depth being shallower than a depth of the dimple (10, 20, 30, 40) and is configured to control a ratio between a size of the upstream cavitation formation region (10a, 20a, 30a, 40a) and a size of the downstream positive pressure generation region (10b, 20b, 30b, 40b). a pair of sliding parts (3, 5) having sliding faces to slide relative to each other, one of an inner peripheral side and an outer peripheral side of the sliding parts (3, 5) is a high-pressure fluid side and the other of the inner peripheral side and the outer peripheral side of the sliding parts (3, 5) is a low-pressure fluid side, one of the sliding faces being provided with dimples (10, 20, 30, 40), wherein each dimple (10, 20, 30, 40) includes an upstream cavitation formation region (10a, 20a, 30a, 40a) disposed close to the low-pressure fluid side, a downstream positive pressure generation region (10b, 20b, 30b, 40b) disposed close to the high-pressure fluid side, and a connection region (10c, 20c, 30c, 40c) connecting the upstream cavitation formation region (10a, 20a, 30a, 40a) on the downstream side and the downstream positive pressure generation region (10b, 20b, 30b, 40b) on the upstream side, wherein a positive pressure relief groove (15, 25, 35, 45) is provided at a distal end (20d, 40d) of the downstream positive pressure generation region (10b, 20b, 30b, 40b) in a manner connecting the downstream positive pressure generation region (10b, 20b, 30b, 40b) and the high-pressure fluid side, characterized in that each dimple (10, 20, 30, 40) has a crank shape, and the positive pressure relief groove (15, 25, 35, 45) has a depth being shallower than a depth of the dimple (10, 20, 30, 40) and is configured to control a ratio between a size of the upstream cavitation formation region (10a, 20a, 30a, 40a) and a size of the downstream positive pressure generation region (10b, 20b, 30b, 40b).