Rhinoliths ars nasal calculi which usually result from precipitation of calcium or magnesium salts from nasal secretion, which usually have a foreign body nucleus of bacteria, blood, puscells, mucus, crusts or some foreign material from outside of the body. They are usually unilateral and have tendency to locate near the floor of the nose and commonly found in adults and females. Recently we have experienced a case of rhinolith in the left nasal cavity of a 44-years old male with chief complaint of nasal obstruction, foul odorous purulent discharge and frequent episode of nasal bleeding, which weighs about 2.4gm and measuring 1.7×1.4×0.9cm. A grey to brownish mass was observed in the left nasal cavity by ant. rhinoscopy appearing of hard cauliflower foam and under local anesthesia, the mass was removed with nasal speculum and forcep. We tried to analysis of its chemical composition, of which composed calcium(95%) chiefly and small amount of others(potassium, silicon, phosphorus, etc.).