In surgical resection of mouth-floor carcinoma, pull-through resection is often performed. After the resection, the defect is reconstructed by primary repair of use of a flap. With primary repair, there is a risk of postoperative infection or the occurrence of an orocutaneous fistula occurred by the dead space inside the mandible. Spiro described a new technique of floor of the mouth repair involving trans-mandibular suturing (transmandibular repair technique), that has proved useful after resection of sublingual tumors (1995) . We report four mouth-floor carcinoma cases in which pull-through resection was followed by transmandibular repair technique.