Cranioplasty is a neurosurgical technique that replaces a bone defect in the skull with hard replacement tissue. It is indicated in particular after a decompressive craniectomy performed in severe head trauma in order to control intracranial hypertension refractory to medical treatment. Cranioplasty is sometimes associated with a significant number of complications, including hydrocephalus. In this article, we report the case of a cranioplasty flap lifting on intracranial hypertension following postoperative hydrocephalus and discuss the clinical relevance with a review of the literature.