Pleomorphic adenoma is the most frequent benign tumor of the salivary gland. It is a slow-growing tumor and is characterized by varying amount of myxochondroid stroma, produced by the myoepithelial cells. About 90% of benign neoplasm of major salivary glands is associated with the parotid gland. The occurrence of sub-mandibular gland pleomorphic adenoma is uncommon. Pleomorphic adenoma have low proliferative rate and have a good prognosis. Presented here is the case of a 35-year-old lady with a swelling below the right angle of the mandible.