Micrometric regulation system for stretcher during the helicopter winching; it allows to obtain the optimum position even in case of uneven distribution of the load (i.e. children,people of small or tall stature,oxygen cylinder or accessories positioned at the foot of the stretcher). This device is made up of a Trimmer,which allows a millitetric adjustment both in the recovery and in the release of the rope,an asymmetric Quick Link connector (maillon) for the connection precise to the harness with the minimum obstruction,a rope of 11 mm of 130 cm in length with sewn terminals,a carabiner Tango in one of the ends of the rope and a practical transport bag that also allows us thanks to its velcro fasteners,it can be attached to the harness and can store the excess rope.