Abstract: This invention in general relates to a disc brake having a caliper attached to a support secured to a structural part of a vehicle or an attachment thereto to brake the vehicle by causing the members of the caliper to press friction pads against both sides of a disc rotor which is connected to the vehicle, and, more particularly to an improvement in the disc brake of such a type effected by removing the protrudent parts that have conventionally been provided on the front of the support confronting the disc rotor and by thus making the support into a shape that permits insertion of the disc rotor through the front thereof for easy mounting of the disc brake on the vehicle. The improved construction of the disc brake is particularly suitable for use in large vehicles.