Fibrous dysplasia is a relatively rare condition characterized by fibrous tissue replacement of skeleton. The etiology is unknown, but it is now believed to be a developmental error in which primitive fibrous tissue proliferates within the bony medulla and encroaches upon the cortex. If it is found in face, usually the maxillary or mandibular bone is involved but it is extremely rare in nasal bone. The authors experienced a case of fibrous dysplasia of nasal bone in 22 year-old male, and report this case with brief review of literatures.