Gliosarcoma is a relatively rare malignant primary brain tumor with an incidence of 1.7% and 2.3% of all gliomas, 5% of astrocytomas and 8% of glio-blastoma multiformes. It is a malignant neoplasm with mixed morphologic feature of both glioblastoma multiformes and sarcoma. The histologic pictures should consist of neoplastic glial cells and spindle-cell sarcoma not only the hyperplasia and hypertrophy of the vascular endothelial elements. We present a case of gliosarcoma in a 23-year-old male patient and review the clinical course, computer tomography and MRI findings, surgical aspects, and the tumor's histological features.