Acinic cell carcinoma is a rare salivary gland tumor of low-grade malignancy. It comprises only about 2.5% of all salivary gland tumors. We recently experienced a case of fine needle aspiration cytology of acinic cell carcinoma of the parotid gland. The characteristic cytopathologic features were 1) cellular aspirate consisting of monomorphic cells in large sheets or singly, 2) formation of acini and/or microcysts, 3) abundant granular cytoplasm with sharp cytoplasmic borders, 4) bland nuclei with micronucleoli, and 5) clear background.