To solve the problem that woody plywood has a high function as a structural material but is not so excellent in heat insulation, and that it corrodes because it is weak to moisture such as the infiltration of rain water and dew condensation.

Heat shield woody plywood capable of being used as both a structural material and a heat shield heat insulation board is constituted by attaching a raw material with high reflectivity to radiation heat such as aluminum foil on one face or both faces of the woody plywood used as a structural material in a building.