Provided is a retractor for endoscopic surgery and the like, which can be placed in a vicinity of a target organ in a body cavity, while reducing burdens on a patient. The retractor is a surgical retractor including a liquid-absorbing and swelling material, wherein the liquid-absorbing and swelling material is formed in a roll shape, the roll-shaped liquid-absorbing and swelling material absorbs liquid in a body cavity to swell and expand into a planar shape.
