A connecting mechanism between an aircraft door and a structure of the aircraft, a related aircraft and method are provided. The connecting mechanism includes an arm intended to be hinged on to the structure, a rotating connection between the door and the arm. The rotating connection may be disengaged from a connection configuration for connecting the door with the arm in an open position of the door, into an uncoupling configuration for uncoupling of the door from the arm, in a closed door position of the door.