Wilm’s tumour is most common malignant renal tumour of childhood. Rarely, it is seen in the adults. We report a 70 year old female presenting with flank pain. Abdominal CT scan revealed a right renal mass and a clinical diagnosis of renal cell carcinoma was made. Nephrectomy was performed and a final diagnosis came as adult Wilms’ tumour. Adult Wilms’ tumour is aggressive and have poor prognosis and should be treated with the similar protocols as those used in children.