Multilayer sheet made of polyglycolic acid resin

3 −1 A polyglycolic acid resin-based multilayer sheet, comprising: a plant substrate sheet and a biodegradable resin layer laminated by melt-adhesion onto the plant substrate sheet, wherein said biodegradable resin layer comprises one or plural layer including at least a polyglycolic acid resin layer, and the multilayer sheet includes on the substrate sheet a melt-adhesion layer comprising a biodegradable resin exhibiting a melt viscosity of 10-5.0×10Pa·sec as measured at a temperature of 240° C. and a shear speed of 122 secand having a melting point of at most 235° C. The multilayer sheet has a laminate structure composed of biodegradable materials exerting little load to the environment at the time of disposable thereof and yet is excellent in oxygen-barrier property and moisture resistance, thus being suitable as a food container-forming material.