A disc brake for a vehicle, having a first and a second brake lining (2a), and a brake disc (1) which is arranged between them, and a brake caliper which engages over the brake disc (1) with a brake caliper housing (6), in which a brake application device is arranged, wherein the brake application device comprises a pressure piece (3) which can be applied against the first brake lining (2a), wherein a boot (5) is provided for protecting the interior of the brake caliper housing against contaminants, wherein the boot (5) is fastened by way of a first end region (5a) to the brake caliper housing (6) and by way of a second end region (5b) to a sheet metal arrangement (7) consisting of a sheet metal plate (8) and a sheet metal ring (9) which is arranged coaxially with respect thereto and is connected in an integrally joined manner to said sheet metal plate (8), wherein the sheet metal plate (8) is arranged between an end side of the pressure piece (3) and the first brake lining (2a), wherein the sheet metal ring (9) is arranged between the boot (5) and the brake lining (2a) for protecting the boot (5) against heat radiation which is generated by way of braking operations on the brake linings (2a, 2b) and the brake disc (1), and wherein the sheet metal ring (9) has at least one cut-out (11) for reducing its flexural stiffness.