The authors report three different types of cranial bone lesions due to a meningioma of the convexity. This rare tumour is most often benign, with variable radiological appearances. The diagnosis is often suggested by tangential views of the cranial vault and CT scan but meningioma remains a histological diagnosis, notably in its primary intra-osseous form without actual meningeal involvement. The prognosis is good and the risk purely local, by vascular or cerebral compression. Treatment is surgical, sometimes complicated by recurrence.