A brake disc comprising: a pair of disc bodies configured to sandwich therebetween a wheel for railway vehicle, each of the disc bodies having a through wall forming a through-hole in a contact surface that contacts a brake pad to brake rotation of the wheel; wherein: the pair of disc bodies can be fastened to each other with the wheel therebetween, by a fastening member including a bolt and a nut; and the through wall provided on one of the pair of disc bodies is partially provided with a restriction wall that restricts the nut from rotating together with the rotation of the bolt when the pair of disc bodies are fastened to the wheel, characterized in that the through wall provided with the restriction wall forms a first through-hole; and the through wall, which is provided on the other of the pair of disc bodies and is not provided with the restriction wall, is partially provided with a bolt accommodation wall that rotatably accommodates a head part of the bolt, so as to form a second through-hole, wherein a plurality of the first through-holes and a plurality of the second through-holes are formed in one of the pair of disc bodies; and a plurality of the first through-holes and a plurality of the second through-holes are formed in the other of the pair of disc bodies. a pair of disc bodies configured to sandwich therebetween a wheel for railway vehicle, each of the disc bodies having a through wall forming a through-hole in a contact surface that contacts a brake pad to brake rotation of the wheel; wherein: the pair of disc bodies can be fastened to each other with the wheel therebetween, by a fastening member including a bolt and a nut; and the through wall provided on one of the pair of disc bodies is partially provided with a restriction wall that restricts the nut from rotating together with the rotation of the bolt when the pair of disc bodies are fastened to the wheel, characterized in that the through wall provided with the restriction wall forms a first through-hole; and the through wall, which is provided on the other of the pair of disc bodies and is not provided with the restriction wall, is partially provided with a bolt accommodation wall that rotatably accommodates a head part of the bolt, so as to form a second through-hole, wherein a plurality of the first through-holes and a plurality of the second through-holes are formed in one of the pair of disc bodies; and a plurality of the first through-holes and a plurality of the second through-holes are formed in the other of the pair of disc bodies. the pair of disc bodies can be fastened to each other with the wheel therebetween, by a fastening member including a bolt and a nut; and the through wall provided on one of the pair of disc bodies is partially provided with a restriction wall that restricts the nut from rotating together with the rotation of the bolt when the pair of disc bodies are fastened to the wheel, characterized in that the through wall provided with the restriction wall forms a first through-hole; and the through wall, which is provided on the other of the pair of disc bodies and is not provided with the restriction wall, is partially provided with a bolt accommodation wall that rotatably accommodates a head part of the bolt, so as to form a second through-hole, wherein a plurality of the first through-holes and a plurality of the second through-holes are formed in one of the pair of disc bodies; and a plurality of the first through-holes and a plurality of the second through-holes are formed in the other of the pair of disc bodies.