Brake disc for railway vehicle

A brake disc for a railway vehicle, comprising:

• a disc plate portion having a sliding portion on a front face, the disc plate portion being a single member having an annular disc shape,
• a plurality of through-holes that pass from the front face to a rear face of the disc plate portion and are arranged in alignment in a circumferential direction of the disc plate portion, the through-holes allowing bolts to pass therethrough for fastening together the disc plate portion and a wheel of a railway vehicle;
• and
• a groove provided to link the plurality of through-holes on the front face side of the disc plate portion,
• wherein the plurality of through-holes are respectively provided at a plurality of locations on a same diameter of the disc plate portion, and the groove circulates in an annular manner linking the plurality of through-holes, and
• a width of the groove in a radial direction of the disc plate portion is smaller than a diameter of an opening portion on the front face side of the through-hole.