A brake disk (1; 40; 60; 80; 90; 100) comprising a bell (2), having an axis of rotation (3), and a braking band (4), produced as separate parts and in engagement by means of a shaped coupling (14) with tangential and axial restraints is characterized in that the brake disk comprises at least one insert (19; 41; 61; 81) which is deformable in a plastic or elastic manner in the shaped coupling (14) in order to ensure that the loads transmitted by a braking action are distributed substantially uniformly on the braking band (4) and on the bell (2).