Intracranial oligodendrogliomas show relatively low incidence among the intracranial tumors and difficult to differentiation with the other brain tumors, CT Plays and important role in the diagnosis of these lesions. Authors reviewed the 16 cases of pathologicaly proven oligodendrogliomas at Korea univer-sity medical center for recent 7 years and the results were as follows: 1. They showed biphasic age distribution one peak in 2nd decade and another in 5th decade. 2. 14 cases (88%) located supratentorially and frequent in frontal lobe of the patient age over 20(6/8) frequent in parietal lobe below 20(4/6) 3. Generally the tumors composed of solid portion but they almost always had some cystic or degenerative portion. 4. The diameter of the tumors varied from 2.5cm to 8 cm 5. The tumor calcification on CT scans were found in 14 cases and appearences were; 1) large irregular nodular calcifications ; 5 cases 2) small nodular calcification ; 4 cases 3) scatteren stippled calcifications; 4 cases 4) shell like incomplete circular calcifiations; 2 cases 6. 14 cases (88%) showed contrast enhanement irregular enhancement in 5 case diffuse enhancement in 4 cases and ring like enhancement pattern in 5 cases .