A seat for a vehicle, having a seating, suitable to allow a driver having two opposite flanks to sit on said seating in the forward direction of the vehicle, said vehicle having a vehicle floor, - said seating having a first flank and a second flank, on opposite sides with respect to the seating, extending substantially parallel to said driver's flanks, said seating having a front side facing the forward direction of the vehicle, and an opposite rear side, facing the reverse direction of the vehicle, said seating further having a lower surface or face facing at least one portion of said vehicle floor, said seat comprising: - a support for said seating that is suitable to allow at least the height adjustment of said seating relative to the vehicle floor, comprising a first piston rod and a second piston rod arranged at the front part and externally facing on opposite sides said flanks (6 and 7) of said seating, and comprising a third piston rod and a fourth piston rod arranged at the back and facing on opposite sides said flanks (6 and 7) of said seating or elongations thereof, each of said piston rods (11, 12, 13, 14) having a respective upper hinge (15, 16, 17, 18) directly connected to said flanks (6, 7) of said seating and a respective lower hinge (19, 20, 21, 22) suitable to be constrained directly or indirectly to the vehicle floor, each of said hinges having a respective rotation center, said rotation centers of said lower hinges defining a base plane passing through said centers, said first piston rod and said third piston rod forming a first articulated quadrilateral externally facing, at least partially, said first flank of the seating, and said second and fourth piston rods forming a second articulated quadrilateral externally facing, at least partially, said second flank of said seating wherein said first and second quadrilaterals (23 and 24) have a lower side (25, 26) directly or indirectly connectable to the vehicle floor, and an upper side (27, 28) directly connected to the seating, wherein: - said upper hinges (15, 16, 17, 18) are above said lower surface or face of said seating; and - said lower surface or face of said seating is at least partially below said base plane, in any position of adjustment of said seating. - said seating having a first flank and a second flank, on opposite sides with respect to the seating, extending substantially parallel to said driver's flanks, said seating having a front side facing the forward direction of the vehicle, and an opposite rear side, facing the reverse direction of the vehicle, said seating further having a lower surface or face facing at least one portion of said vehicle floor, said seat comprising: - a support for said seating that is suitable to allow at least the height adjustment of said seating relative to the vehicle floor, comprising a first piston rod and a second piston rod arranged at the front part and externally facing on opposite sides said flanks (6 and 7) of said seating, and comprising a third piston rod and a fourth piston rod arranged at the back and facing on opposite sides said flanks (6 and 7) of said seating or elongations thereof, each of said piston rods (11, 12, 13, 14) having a respective upper hinge (15, 16, 17, 18) directly connected to said flanks (6, 7) of said seating and a respective lower hinge (19, 20, 21, 22) suitable to be constrained directly or indirectly to the vehicle floor, each of said hinges having a respective rotation center, said rotation centers of said lower hinges defining a base plane passing through said centers, said first piston rod and said third piston rod forming a first articulated quadrilateral externally facing, at least partially, said first flank of the seating, and said second and fourth piston rods forming a second articulated quadrilateral externally facing, at least partially, said second flank of said seating wherein said first and second quadrilaterals (23 and 24) have a lower side (25, 26) directly or indirectly connectable to the vehicle floor, and an upper side (27, 28) directly connected to the seating, wherein: - said upper hinges (15, 16, 17, 18) are above said lower surface or face of said seating; and - said lower surface or face of said seating is at least partially below said base plane, in any position of adjustment of said seating.