Fibrosarcoma is a malignant neoplasm of fibroblastic origin and rarely affects the maxilla. This case of primary fibrosarcoma maxilla in a 60 year old male describes histopathological pattern and its differential diagnosis with IHC. The patient was treated with partial maxillectomy. The patient presented with recurrence after 8 months of resection. This case is being submitted for its rarity. Fibrosarcoma (FS) is a malignant mesenchymal tumour with fibroblastLc proliferation and variable amount of collagen production. In classical cases, herringbone architecture is seen. FS essentially, is a diagnosis of exclusion, thus exact incidence rate cannot be assessed. It mostly accounts for 1-3% of adult sarcomas. It is more frequently seen in soі tissue but primary intraosseous origin has been described in 5% of all cases. It rarely aوٴects head and neck region (10%). Mandible is the more common site of involvement in this region. Maxilla is rarely involved and accounts for only 0 to 6.1% cases. Involvement of maxillary antrum is rarely seen. FS of jaw can be periosteal (peripheral) or endosteal (central).