A new surgical procedure of ligation of the thoracic duct through a transabdominomediastinal approach is introduced. The procedure enables an easy approach to the posterior lower mediastinum and ligation of the duct at levels as low as 10th or 11th thoracic vertebra, close to the cisterna chyli, without thoracotomy. The comprehensive feasibility of this as an alternative to the conventional transthoracic procedure for curing traumatic chylothorax is considered.