Brake disc for railway vehicle

A brake disc for a railway vehicle, comprising:

• a disc body that has a front surface and a back surface, the disc body being annular and decreasing in thickness as the disc body extends inward in a radial direction;
• and
• a plurality of fins that are radially disposed on the back surface, at least one of the fins having a bolt hole at a central portion of the fin in the radial direction, wherein
• the disc body includes a plurality of projections that are formed on a portion of the back surface, the portion being positioned outward from the bolt hole in the radial direction, and
• the fins each include:
• a top surface that extends in the radial direction;
• and
• a convex portion that, as viewed in a section of the brake disc cut in the radial direction, protrudes inward in the radial direction from an imaginary plane passing an end portion of the top surface and an inner circumferential edge of the back surface, the end portion being one of both end portions of the top surface, whichever is positioned inward in the radial direction.