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 . <EOS>