Neurofibromatosis type-1 (NF-1) associated-intrathoracic meningocele is a rare clinical finding. We report the cases of two adults who were diagnosed with NF-1-associated intrathoracic meningoceles and successfully treated with a novel surgical technique called “dural turnover repair method.” Both patients were symptomatic. Preoperative imaging showed a cystic lesion in the thoracic cavity of both patients. Their symptoms were relieved and the cysts were markedly diminished postoperatively. Neither patient experienced complications from the operation. We wish to emphasize that the novel “dural turnover repair method” is effective in the treatment of intrathoracic meningocele associated with NF-1.