Abstract: Provided is a disc brake with a system for checking the position in which brake pads are installed, and brake pads having, in both halves, notches defining a point of correspondence for fitting with respective projections formed in the housings for holding the brake pads, such that the notches in the two halves of each brake pad define spaces of equivalent volume, said notches in the halves of the brake pad being positioned at different distances (S1 and S2) from the central axis of the pad and/or said notches having a configuration which is different, at least, along the top edge.