PURPOSE: To repel living pest insects by mixing a repellent into an adhesive agent for raw material veneers forming a laminated flitch, and gradually emanating the repellent to the outside.

CONSTITUTION: The raw material veneers 1a, 1b are coated with the adhesive agent 2a, 2b including the repellent by using a coating device such as a spreader, a spray and a flow coater. As the repellent, triamide repellent is used. A plurality of sheets of raw material veneers 1a, 1b coated with the adhesive agent 2a, 2b are stacked through the adhesive agent 2a, 2b in a state that the fiber directions thereof are in parallel with each other. The laminated flitch is manufactured by performing the pressing adhesion to the laminate by the cold pressure or hot pressure by using a turn buckle, a cold press and a hot press.