A 44 year old female presented with an intraoral soft tissue swelling in the retromolar region, which was painless, mobile and fluctuant in nature. Computed tomography as well as preoperative ultrasound revealed thick walled cystic lesion. The lesion was clinically diagnosed as mucocele. Ultrasound guided fine needle aspiration was done, which revealed turbid, straw colour fluid. This cystic swelling was completely excised and histopathologically identified to be low grade Mucoepidermoid carcinoma. This unusual presentation of Mucoepidermoid carcinoma as an intraoral cyst is one of the rare and unique reported case.