Osteomas of the external auditory canal are considered clinically to be discrete, pedunculated bone lesions arising along the tympanosquamous suture. They are benign lesions but often slowly grow progressively in size which eventually resulted in obstruction of the external auditory canal. When this occurs, the patient will complain of deafness. Exostoses, similar to the osteoma, are broad based elevation of the bone usually multiple and bilatelly symmetric, involving the tympanic bone. Recently, the authors have experienced a case of the osteoma of the external auditory canal, and so report with some reviews of the literatures.