Sialodochitis is an inflammatory disease on salivary gland duct. Although most of sialoadenitis includes inflammatory status of ductal system, an unusual behavior such as localized inflammation only in the duct is rarely observed. Sialodochitis is a very rare disease that was first reported by Kussmaul in 1879.1) Common symptoms of chronic sialodochitis are an excretion of mucous plugs and a swelling of the cheek. Sialodochitis may be associated with a type I hypersensitivity in the salivary duct and parotid gland, because of the large amount of eosinophils in saliva, and the common allergic history such as bronchial asthma and allergic rhinitis. The management of sialodochitis depends on the severity of disease. The surgical procedure such as drainage operation, sialodochoplasty, or superficial parotidectomy can be selected. We report the case of chronic sialodochitis with literature review.