A motor vehicle disc brake which includes: - a brake disc which extends in a plane transverse to an axis (A) of axial orientation of the rotation of the disc; - a support fixed relative to a chassis of the vehicle; - at least one brake pad , each of which includes a friction lining a transverse friction face of which cooperates with an associated brake track of the disc , the brake pad being slidably mounted axially in the support between an active front position wherein said friction face is bearing against the associated annular track of the disc , and an inactive rear position wherein said friction face is axially spaced from said associated annular track of the disc, by a determined operation clearance (J1); - at least one member for elastically returning the brake pad to its inactive position, which is interposed between the brake pad and the support , the elastic return member being fixed to the support via means for adjusting a clearance (J2) of the wear of the brake pad friction lining which plastically deform when the stroke of the brake pad until its active position is greater than said determined operation clearance (J1), and the elastic return member including a blade including at least one first axial orientation section which is elastically deformable by traction between a rest state and a maximum elongation state, the value of which is equal to the determined operation clearance (J1), - this blade including a first fixed rear end which is immobilised forward into axial abutment on the support , and a second movable front end which is hooked to the brake pad to be pushed by the brake pad during its sliding towards its active position so as to elastically deform the first elastically deformable section ; characterised in that the blade includes at least one second plastically deformable section , under the effect of an axial traction force, forming said wear clearance (J2) adjustment means, this second plastically deformable section being shaped to be plastically elongated when the stroke of the brake pad until its active position is greater than said determined operation clearance (J1). - a brake disc which extends in a plane transverse to an axis (A) of axial orientation of the rotation of the disc; - a support fixed relative to a chassis of the vehicle; - at least one brake pad , each of which includes a friction lining a transverse friction face of which cooperates with an associated brake track of the disc , the brake pad being slidably mounted axially in the support between an active front position wherein said friction face is bearing against the associated annular track of the disc , and an inactive rear position wherein said friction face is axially spaced from said associated annular track of the disc, by a determined operation clearance (J1); - at least one member for elastically returning the brake pad to its inactive position, which is interposed between the brake pad and the support , the elastic return member being fixed to the support via means for adjusting a clearance (J2) of the wear of the brake pad friction lining which plastically deform when the stroke of the brake pad until its active position is greater than said determined operation clearance (J1), and the elastic return member including a blade including at least one first axial orientation section which is elastically deformable by traction between a rest state and a maximum elongation state, the value of which is equal to the determined operation clearance (J1), - this blade including a first fixed rear end which is immobilised forward into axial abutment on the support , and a second movable front end which is hooked to the brake pad to be pushed by the brake pad during its sliding towards its active position so as to elastically deform the first elastically deformable section ; <EOS>