Pleomorphic adenoma(PA) is the single most common salivary gland tumor. It has a diverse histological presentation because of varying proportions of different epithelial and mesenchymal elements, and presents clinically and radiologically in various ways as it occurs at many different sites in the head and neck region. Very occasionally however, metastatic lesions are identified in patients with a history of PA, which, on detailed pathological evaluation, are found to exhibit all the histological hallmarks of the preceding benign lesions. Metastasizing Pleomorphic Adenoma (MPA) of parotid gland is a rare condition in which the etiology remains incompletely understood and the histological appearance, currently indistinguishable from a benign pleomorphic adenoma, is at great variance with its clinically malignant behavior. Its histologic features may exhibit recurrence and locally aggressive behavior especially after incomplete excision. We present 40 year-old man with the MPA of the parotid gland who had history of a incomplete surgery 20 years ago. We realized that facial nerve injury can occur more frequently during surgery of MPA.