We present a case of 35 year old female with Right Internal carotid artery agenesis . The Axial and coronal T2- weighted MRI demonstrated an absent right internal carotid artery flow void. A subsequent magnetic resonance angiography showed absence of the right internal carotid artery. This finding was confirmed by magnetic resonance angiography of the cervical vessels, and axial computed tomography angiography showed agenesis of the right carotid artery. The literature reports such finding in association with other anomalies such as transsphenoidal encephaloceles and circle of Willis aneurysms. These associations were not observed in the present case. The patient remained asymptomatic.