Hydraulic braking device for a vehicle, comprising a master cylinder and a servo-device, wherein - a hydraulic piston of the master cylinder defines a pressure chamber which is adapted to contain a pressurized liquid and in which a control pressure is generated that is transmitted to one or more brake(s) of the vehicle; - a plunger of the servo-device defines a first chamber and a second chamber of the servo-device, said chambers being associated with communication means adapted to establish, when the braking device is in a rest condition, a hydraulic communication between the first chamber and the second chamber and to interrupt said communication when the braking device is actuated; - a shuttle piston , connected to a thrusting rod associatable with a brake pedal, is mounted to be sealingly slidable in a plunging piston movably integral to the plunger of the servo-device, characterized in that it comprises - a hydraulic coupling connected in a movably integral manner to the thrusting rod and comprising an inlet aperture opening into an rear inner cavity of the hydraulic coupling and hydraulically connected to a solenoid valve, - a stem associated, on the side of a first end thereof, to the hydraulic coupling and having, on the side of its second end , the shape of a spherical tip ; - a distributor block sealingly received within the plunging piston and adapted to abut against the shuttle piston , wherein the spherical tip of the stem is associated, in an articulated manner, to the distributor block , and wherein the rear inner cavity of the hydraulic coupling is in hydraulic communication with a through-channel formed within the stem , said through-channel being in turn in hydraulic communication with a driving duct formed in the distributor block , said driving duct opening into a region comprised between the distributor block and the shuttle piston . - a hydraulic piston of the master cylinder defines a pressure chamber which is adapted to contain a pressurized liquid and in which a control pressure is generated that is transmitted to one or more brake(s) of the vehicle; - a plunger of the servo-device defines a first chamber and a second chamber of the servo-device, said chambers being associated with communication means adapted to establish, when the braking device is in a rest condition, a hydraulic communication between the first chamber and the second chamber and to interrupt said communication when the braking device is actuated; - a shuttle piston , connected to a thrusting rod associatable with a brake pedal, is mounted to be sealingly slidable in a plunging piston movably integral to the plunger of the servo-device, characterized in that it comprises - a hydraulic coupling connected in a movably integral manner to the thrusting rod and comprising an inlet aperture opening into an rear inner cavity of the hydraulic coupling and hydraulically connected to a solenoid valve, - a stem associated, on the side of a first end thereof, to the hydraulic coupling and having, on the side of its second end , the shape of a spherical tip ; - a distributor block sealingly received within the plunging piston and adapted to abut against the shuttle piston , <EOS>