A fastening device for fastening an operational member on a support, the fastening device consisting of a fastening rivet capable of being fastened in a mounting orifice formed in the support and of a silent block coupled to the fastening rivet and delimiting a receiving and holding zone capable of receiving and holding a portion of the operational member, the fastening rivet comprising: - a male inner part comprising a locking rod, - and a female outer part of a tubular shape comprising: - a bearing lower portion, arranged in a lower portion of the female outer part and extending radially projecting from the female outer part so as to be able to bear against an upper face of the support, - a plurality of movable wings internally delimiting between them an axial passage capable of receiving the locking rod with a possibility of sliding according to a longitudinal axis of the axial passage, the movable wings being angularly distributed about the axial passage by being articulated in an upper portion of the female outer part of the fastening rivet so that each movable wing has a radial deflection capacity from a radially initial configuration toward a radially spaced configuration, this deflection being controlled by a longitudinal displacement of the locking rod of the male inner part from an unlocking raised position toward a locking lowered position, - counter-bearing elements respectively secured to the movable wings and configured so as to bear against a lower face of the support when each movable wing occupies its radially spaced configuration, in which the silent block has a tubular shape delimiting a through passage to be axially mounted along the female outer part of the fastening rivet and extends around the female outer part of the fastening rivet, in which the lower portion of the female outer part of the fastening rivet delimits blocking elements, arranged near the bearing lower portion, to be inserted into the through passage of the silent block and cooperating with the silent block so as to confer an embedding connection between the silent block and the female outer part of the fastening rivet, this embedded connection being located in the lower portion of the female outer part of the fastening rivet and ensuring a blocking of the silent block radially and longitudinally with respect to the female outer part of the fastening rivet. - a male inner part comprising a locking rod, - and a female outer part of a tubular shape comprising: - a bearing lower portion, arranged in a lower portion of the female outer part and extending radially projecting from the female outer part so as to be able to bear against an upper face of the support, - a plurality of movable wings internally delimiting between them an axial passage capable of receiving the locking rod with a possibility of sliding according to a longitudinal axis of the axial passage, the movable wings being angularly distributed about the axial passage by being articulated in an upper portion of the female outer part of the fastening rivet so that each movable wing has a radial deflection capacity from a radially initial configuration toward a radially spaced configuration, this deflection being controlled by a longitudinal displacement of the locking rod of the male inner part from an unlocking raised position toward a locking lowered position, - counter-bearing elements respectively secured to the movable wings and configured so as to bear against a lower face of the support when each movable wing occupies its radially spaced configuration, in which the silent block has a tubular shape delimiting a through passage to be axially mounted along the female outer part of the fastening rivet and extends around the female outer part of the fastening rivet, in which the lower portion of the female outer part of the fastening rivet delimits blocking elements, arranged near the bearing lower portion, to be inserted into the through passage of the silent block and cooperating with the silent block so as to confer an embedding connection between the silent block and the female outer part of the fastening rivet, this embedded connection being located in the lower portion of the female outer part of the fastening rivet and ensuring a blocking of the silent block radially and longitudinally with respect to the female outer part of the fastening rivet.