Renal masses can be categorized as benign and malignant lesions. Among the renal malignancies, renal cell carcinoma is the most common malignancy. However, other rare malignant lesions should be considered in differential diagnosis. Primary renal lymphoma is quite rare and might be mistaken for renal cell carcinoma. Due to lack of lymphatic tissue in the kidney, pathogenesis of renal lymphoma is controversial. In the present case, a 75- year-old man presented with a locally advanced renal mass and after resection of the mass, a diagnosis of Non-Hodgkin’s lymphoma was confirmed.