Stabilization system for opening and closing a wing, in particular roto-translating or hinged or of the swing kind, wherein the wing assembly comprises a wing provided with an inner face, an outer face, a handling side edge and a trailing side edge; and at least one structural element facing the trailing side edge when the wing is in the closed position; wherein the system comprises a first body coupled to the trailing side edge of the wing configured to form a localized protrusion; and a second body coupled to a structural element comprising a stable seat for receiving at least part of the first body; wherein the seat is configured on one side to allow the free entry and exit of the first body when the wing is moved at the handling side edge and on the other side to lock the first body in the seat when the wing is moved at the trailing side edge.