A case of malign mesothelioma of tunica vaginalis testis in a 67 year old man with a 30 year history of hydrocele was reported. The diagnosis was made with an excisional biopsy performed in scrotal exploration and revealed epithelial type mesothelioma. High orchiectomy with hemiscrotectomy was performed. The patient had a local recurrence at the end of two years. As there were no distant metastasis only local excision was performed. In his sixth month after the second surgery he is still tumor free. Related literature reviewed.