Abstract: It comprises a swivel pin (1) coaxially inserted through a holed element connected to the frame of said mirror, said swivel pin having at a first end (1a) a flange (4) and at a second end (1b) at least a retaining configuration (3) adapted for being fixed on a corresponding retaining configuration of a base connected to a vehicle, an elastic member being arranged between said flange (4) and a support of said holed element. Said elastic member comprises a hollow cylinder (5) of moulded plastic material arranged as a skirt, from the peripheral edge (4) towards said second end (1b) of the swivel pin (1), coaxially to it, said hollow cylinder (5) being provided with at least one opening (6) defining at least one helical strip (7) suitable to provide the hollow cylinder (5) with an elastic property.