Carcinosarcomas are rare tumours, which have both epithelial, and connective tissue elements. They are most commonly seen in the female genital tract. Rarely they arise from the gastrointestinal tract. We report a case of Carcinosarcoma arising as a primary in the spleen of a male aged 60yrs. The most unique feature of this tumour is the presence of osteosarcomatous element. This report highlights the importance of clinical awareness of such rare tumours and gives a brief overview on presentation, probable aetiology, diagnosis and management with literature review of carcinosarcoma.