Abstract: A prosthesis for aero-digestive fistulae for the blocking of an aero-digestive fistulae in cases where the digestive tract does not present anfractuosities similar to those caused by tumors, being impossible to fix a stent in said tract, prosthesis that is of a soft material with elastic memory and comprehends a central part, its section being of approximately the same size of the fistula and two lateral bodies, of greater size, its medial faces being in contact with the perimeter of the fistular surfaces of both sides.