Abstract: To provide an anti-adhesion material capable of producing an excellent anti-adhesion performance without impairing degradability, handleability, and contact properties in actual use. An anti-adhesion material is provided that contains an ascorbic acid or an ascorbic acid derivative as an antioxidant in a solid or semisolid base body made of a water-soluble polymer and a poly(aliphatic ester). Since the anti-adhesion material has the base body acting as a physical barrier inserted between the surfaces of a wound and the healing on the wound surfaces is promoted by the ascorbic acid or the derivative thereof being sustained-released, the anti-adhesion performance is extremely efficiently produced in a synergistic manner.