The methods for repairing scalp defects and skull exposure are introduced. From 1980 to 1991, 9 cases of scalp defects and skull exposure from injury or tumor extirpation were treated with free omentum transfer with split skin graft, free flap or axial flap transfer. The surgical procedure was described in detail. For the whole defect of scalp with skull exposure the authors consider the free anterior-lateral femoral flap more appropriate and suggest that the free omentum flap be avoided as far as possible.