Pseudomeningocele is a rare complication of head trauma. An 7-year-old male child who fell from playground equipment was admitted to hospital with lambdoid sutural diastatic fracture. As epidural and subgaleal fluid collections gradually developed from the subsequent day of admission, a subgaleal drain was placed for cerebrospinal fluid (CSF) diversion. In addition, the scalp just over the fractured segment was compressed by band after drainage whereby the CSF leak was stopped. On the basis of our experience with this case, we suggest that appropriate management enables repair of posttraumatic pseudomeningocele in early stages of injury.