A multilayer sheet made of a polyglycolic acid resin which is constructed
by the fusion/lamination of a biodegradable resin layer on a base sheet
of vegetable origin, characterized in that the biodegradable resin layer
comprises one or more layers involving at least one polyglycolic acid
resin layer and the layer fused with the base sheet is made of a
biodegradable resin having a melt viscosity of 10 to 5.0.times.10.sup.3
Pasec at a temperature of 240.degree. C. and a shear speed of 122
sec.sup.-1 and a melting point of 235.degree. C. or lower. Although the
multilayer sheet has a lamination structure made of biodegradable
materials with light environmental burden at disposal, it is excellent in
oxygen-barrier properties and resistance to moisture transmission. Thus,
it is appropriately usable as a food container material.