A motor vehicle disk brake that includes: - a brake disk that lies in a plane transverse to an axially oriented rotation axis of the disk; - a support fixed relative to a chassis of the vehicle; - a caliper that is mounted to slide axially relative to the fixed support and that includes: -- a rear casing in which a brake piston is mounted to slide axially to cooperate, toward the front, with an interior brake shoe that includes a first friction lining a transverse front friction face of which cooperates with an associated first braking track of the disk; -- a front flange, axially fixed to the rear casing to cooperate with an exterior brake shoe that includes a second friction lining a transverse rear friction face of which cooperates with an associated second braking track of the disk; - the exterior brake shoe being mounted to slide axially in the fixed support between a rear active position in which said transverse rear friction face bears against the associated annular track of the brake disk and a front inactive position in which said transverse rear friction face is spaced axially from said associated annular track of the brake disk by a particular operating clearance, characterized in that the disk brake includes an exterior return spring for returning the exterior brake shoe to its inactive position, in that a rear connecting portion of the exterior return spring is fixed, directly or indirectly, to an associated central portion of the exterior brake shoe, and in that a front fixing portion of the exterior return spring is fixed axially to an associated central portion of the fixed support. - a brake disk that lies in a plane transverse to an axially oriented rotation axis of the disk; - a support fixed relative to a chassis of the vehicle; - a caliper that is mounted to slide axially relative to the fixed support and that includes: -- a rear casing in which a brake piston is mounted to slide axially to cooperate, toward the front, with an interior brake shoe that includes a first friction lining a transverse front friction face of which cooperates with an associated first braking track of the disk; -- a front flange, axially fixed to the rear casing to cooperate with an exterior brake shoe that includes a second friction lining a transverse rear friction face of which cooperates with an associated second braking track of the disk; -- a rear casing in which a brake piston is mounted to slide axially to cooperate, toward the front, with an interior brake shoe that includes a first friction lining a transverse front friction face of which cooperates with an associated first braking track of the disk; -- a front flange, axially fixed to the rear casing to cooperate with an exterior brake shoe that includes a second friction lining a transverse rear friction face of which cooperates with an associated second braking track of the disk; - the exterior brake shoe being mounted to slide axially in the fixed support between a rear active position in which said transverse rear friction face bears against the associated annular track of the brake disk and a front inactive position in which said transverse rear friction face is spaced axially from said associated annular track of the brake disk by a particular operating clearance,