On the basis of 6 personal cases, the authors report the special conditions associated with surgery for stenosis of the crico-tracheal junation : proximity of the recurrent laryngeal nerves, difficulty of accurately matching the upper and lower ends, difficulty in passage of the suture materials. They nevertheless conclude that in the treatment of stenosis at this level of the respiratory tract, resection-anastomosis would appear to give better results than those obtained by Rethi's operation. Alongside major surgery, minor therapeutic techniques and, in particular, the laser used endoscopically also have a role to play : either in the treatment of moderate stenosis, or in the prevention and treatment of recurrent stenoses after resection-anastomosis.