The lingual thyroid is rare in occurrence. Recently, the authors experienced a case of lingual thyroid in 48 years-old male who was visited because of frequent hoarseness. It was found incidentally during physical examination. On physical examination, a soft mass, walnut sized, was visible on tongue base between the level of foramen cecum and epiglottis, slightly protruding with bluish red in color. Suspection lingual thyroid, scintigram was done, which revealed functioning thyroid on post-tongue region. No treatment was given for it because there was no any symptoms and signs due to enlarged soft mass. A review of the literature concerning the case was made.