The purpose of the present invention is to provide a laminate that enables improvement in ease of use when the laminate is attached to an adhesion object, and that is also able to inhibit variation in solubility of a water-soluble material layer. Provided by the present invention is a laminate having: a biodegradable material layer that contains an aliphatic polyester portion and has a thickness of 10-500 nm； and a water-soluble material layer that is disposed on at least one surface of the biodegradable material layer, wherein the water-soluble material layer is formed by stacking, from the side closer to the biodegradable material layer, a first layer that contains a water-soluble polymer (a) and has a thickness of 1-20 µm, a fiber structure that contains a water-soluble polymer (b) and has a thickness of 10 µm to 100 mm, and a second layer that contains a water-soluble polymer (c) and has a thickness of 1-20 µm.
