The arteriovenous malformations(AVMs) of the corpus callosum are distinct anatomical and surgical entities. The AVMs of the corpus callosum are supplied by the pericallosal arteries if the malformations are located in the anterior and middle portion of the callosum and the AVMs of the splenium are usually fed by the pericallosal and posterior cerebral arteries. Radical excision of the callosal AVMs became successful with microsurgical techniques since a few years ago. The authors report a case of the callosal AVM, who had subarachnoid hemorrhage twice prior to this admission, and the studies with angiography and computed tomography revealed an AVM involing the middle portions of the corpus callosum. Radical excision of the AVM was accomplished by microsurgical techniques without neurologic sequela.