Extramedullary plasmacytoma is a rare malignant neoplasm typically arising outside the bone marrow of patients who show no clinical evidence of multiple myeloma. Kidney is a rare site for plasmacytoma. We present here a case of primary renal plasmacytoma confirmed on histopathology of the specimen and immuno-histochemistry studies. Patient was treated with radical nephrectomy followed by radiotherapy. The case is presented due to its rarity.