Oncocytomas are a group of rare neoplasms occurring in the parotid gland and account for less than 1% of all salivary gland tumors. Oncocytoma is a benign tumor composed of oncocytes with many hyperplastic mitochondria, usually presenting a solitary nodule. We reported a rare case of a slow-growing parotid oncocytoma in a 53years old woman who presented with a palpable mass in the left cheek region for about 1years.