Background: Pleomorphic adenoma is the most commonly occurring tumor of the parotid gland (80-90%). Submandibular and sublingual pleomorphic adenomas are quite uncommon constituting approximately 8-10% and are mostly malignant. A complete surgical excision of the tumor is the treatment of choice. Case Report: We report a case of a pleomorphic adenoma of the sub-mandibular gland in an adult male, its diagnosis and surgical management at a tertiary care teaching institute in Eastern India. Conclusion: Neck swellings are difficult to diagnose due to the fact that a myriad of clinical entities may have a common clinical picture. Upon clinical suspicion a careful pre-operative work up including imaging and fine needle aspiration cytology is advocated to arrive at a diagnosis.