Bicycle saddle adapter

An adapter (10) for a bicycle saddle forming a connection interface between a shell or shield (12) of a saddle (13) and a head (14′) of a seatpost tube (14) of the bicycle frame, characterized in that it comprises a plate or foil (15) connected to the shell or shield (12) and interface means for said plate or foil (15) comprising a pair of opposite and parallel ridges (17) longitudinally extended at outer side edges (15B) of the plate or foil (15) cooperating with means for tightening with respect to the head (14′) of the seatpost tube (14) that comprise a lower block (18) adapted to couple to the head (14′) and comprising a pair of opposite and parallel edgings (18″) longitudinally extended and adapted to couple to the opposite and parallel ridges (17) of the plate or foil (15), said adapter comprising an element for damping vibrations which comprises one or more pads stabilized onto the plate or foil (15) and arranged between said plate or foil and a lower front of the shell or shield (12).