Supporting and stabilizing device suitable for fixing a load to a carrier, stabilizing the load with respect to the carrier; said device comprising: - a first attachment for a carrier, - a second attachment for a load; - a first articulation means connected to the first attachment, - a second articulation means connected to the second attachment, - at least one stabilization means disposed between the first articulation means and the second articulation means; wherein said at least one stabilization means comprises: - at least one arm (5, 6) provided with a longitudinal axis and having two ends that are rotatably connected to the first and to the second articulation means (7, 8), - a fixed back piece integral with the arm and provided with a passageway; - a sliding guide means of tubular shape connected to the arm (5, 6); - a rod with an axis; said rod being connected to an articulation means (7, 8) by means of a connecting rod (11, 12); said rod crossing the passageway of the fixed back piece and being slidingly inserted in the sliding guide means; and - an elastic means (9, 10) provided with a first end associated with the sliding guide means and a second end connected to the rod; device characterized in that the sliding guide means is configured in such a way that the rod can vary the orientation of its axis relative to the longitudinal axis of the arm (5, 6). - a first attachment for a carrier, - a second attachment for a load; - a first articulation means connected to the first attachment, - a second articulation means connected to the second attachment, - at least one stabilization means disposed between the first articulation means and the second articulation means; wherein said at least one stabilization means comprises: - at least one arm (5, 6) provided with a longitudinal axis and having two ends that are rotatably connected to the first and to the second articulation means (7, 8), - a fixed back piece integral with the arm and provided with a passageway; - a sliding guide means of tubular shape connected to the arm (5, 6); - a rod with an axis; said rod being connected to an articulation means (7, 8) by means of a connecting rod (11, 12); said rod crossing the passageway of the fixed back piece and being slidingly inserted in the sliding guide means; and - an elastic means (9, 10) provided with a first end associated with the sliding guide means and a second end connected to the rod; - at least one arm (5, 6) provided with a longitudinal axis and having two ends that are rotatably connected to the first and to the second articulation means (7, 8), - a fixed back piece integral with the arm and provided with a passageway; - a sliding guide means of tubular shape connected to the arm (5, 6); - a rod with an axis; said rod being connected to an articulation means (7, 8) by means of a connecting rod (11, 12); said rod crossing the passageway of the fixed back piece and being slidingly inserted in the sliding guide means; and - an elastic means (9, 10) provided with a first end associated with the sliding guide means and a second end connected to the rod; device characterized in that the sliding guide means is configured in such a way that the rod can vary the orientation of its axis relative to the longitudinal axis of the arm (5, 6).