Middle meningeal artery aneurysms are rare. Fewer than 10 true aneurysms and 30 posttraumatic aneurysms on meningeal vessels have been reported. True meningeal aneurysms are associated with tumors, Paget's disease, arteriovenous malformations, and trauma. Potential morbidity is demonstrated with hemorrhage from true aneurysms as well as from pseudoaneurysms of the meningeal vessels. We have described a meningeal artery aneurysm of the vascular pedicle of a convexity meningioma and reviewed the literature.