This chapter provides detail description of paraclinoid aneurysms. Chapter has 9 well illustrated diagrams and pictures. Paraclinoid aneurysms, Neuroanatomy, special radiological considerations, therapeutic options, paraclinoid internal carotid artery, review of classification schemes, circumferential wrapping, trapping of the ICA with or without extracranial-intracranial bypass, cardiopulmonary bypass with profound hypothermia and circulatory arrest, endovascular treatment are described in detail. 1 table is included to highlight paraclinoid aneurysms. 44 references are included at the end of the chapter to facilitate further reading.