We experienced two cases who were inserted dynamic stent (a tracheobronchial silicone stent) to treat esophago-tracheal fistula due to advanced esophageal carcinoma. This procedure permitted to perform esophageal bypass operation under intubated general anesthesia in the first case. After operation, severe coughing improved so much and he could start oral intake and resulted in better performance status. In the second case, by the insertion of dynamic stent general condition recovered well, so he could achieve full course of chemo-radiotherapy and enter in partial response. Esophago-tracheal fistula due to advanced esophageal carcinoma markedly worsens performance status and its treatment is usually very difficult. The insertion of dynamic stent may improved their quality of life, make it possible to achieve further therapy and improve their prognosis.