Frontal sinus fracture associated with cerebrospinal fluid rhinorrhea often neccessitates definitive treatment to prevent grave complications such as mucocele, mucopyocele, brain abscess, and other life-threatening ascending infection of intracranium. The treatment should comprise ablation of frontal sinus, obliteration of dead space and existing intracranialnasopharyngeal communication, and restoration of bony barrier for protection of intracranial-nasopharyngeal communication is the most crucial aspect of the treatment because serious ascending intracranial infection such as intracranial abscess or meningitis is a frequent outcome. In 7 patients with frontal sinus fracture, the authors used pericranial flap or reverse temporalis muscle flap based on the superficial temporal vessels to obliterate the dead space and existing intracranial-nasopharyngeal communication after the ablation of frontal sinus and cranialization of posterior wall of frontal sinus. The patients were followed for 4-20 months, and both pericranial and reverse temporalis muscle flaps were effective to prevent the complications of frontal sinus fracture.