Patent ID: 8327597

Claim:
A wall panel fixed to columns erected on a groundsill to form walls of a wooden house, characterized in that the wall panel comprises a plurality of paulownia plywoods laminated, each of the paulownia plywoods having a three-layer cross-bonded structure in which three paulownia plates are bonded together, with their grains being crossed, a direction of the grain of the inner paulownia plate being a transverse direction, and a direction of the grain of the outer paulownia plate being a longitudinal direction, wherein the plurality of wall paulownia plywoods includes a first paulownia plywood, a second paulownia plywood, a third paulownia plywood and a fourth paulownia plywood laminated in the recited order, wherein the first and second paulownia plywoods have a width coincidence with a distance between centers of adjacent columns, and the third and fourth paulownia plywoods have a width which is wider than the width of the first and second paulownia plywoods.