To integrate floor boards covering a truck platform without welding a plurality of floor board constitution members.

The floor boards of the truck platform covers the platform in which a plurality of floor board constitution members 1 made of metal are integrally attached to the platform. Each of the floor board constitution members 1 are adhered to adjacent ones of floor board constitution members 1 with adhesive agent to integrate with adjacent ones of floor board constitution members 1. Each of the floor board constitution members 1 includes at least one of an adhesive part 5 and an adhered part 4 that is adhered to the adhesive part 5 with the adhesive agent. At least the adhesive part 5 and the adhered part 4 are made of aluminum and the adhesive agent is methacrylate adhesive agent. Each of the floor board constitution members 1 is attached to the platform with fixtures such as screws.