A resin panel according to an embodiment of the present invention is provided with a core material, a reinforcement material, a skin material that covers the core material and the reinforcement material, and a member to be fastened. The reinforcement material 3 has a first plate that is provided on the front surface of the core material, a second plate that is provided on the rear surface of the core material, and a connecting plate that connects the first plate and the second plate. The member to be fastened is attached to the skin material by means of a fastening member that passes through the skin material and the first plate or second plate of the reinforcement material.