A recognized surgical approach to the tumors of the oral cavity and oropharynx involves splitting the lip and dividing the mandible. The undoubted benefits of this mandibular swing to the posterior oral cavity and oropharynx have been reported. What remains in question are the best site at which to divide the bone, the form the bone cut should take, and the most effective way of stabilizing the bone when continuity of the mandibular arch is reestablished. Various kinds of mandibulotomy are currently being used, A review of 21 patients who had underwent mandibulotomy was done retrospectively. We discussed the ideal sites, shapes of the mandibular osteotomy, repair materials and complications. Crevicular flap was the useful method to prevent complication of mandibulotomy. We think paramedian, stair-step osteotomy and repairing with the miniplate was the most suitable procedure for mandibulotomy.