The presence of a heterotopic cartilaginous mass in the bony external auditory canal is an unusual and interesting finding. Relatively little information about this entity has accumulated. Appearing as a white hard mass, cartilaginous choristoma can be found in the medial portion of anterior wall of external auditory canal. Histologically, it consists of adult-type hyaline cartilage without neoplastic features. The term “cartilaginous choristoma”rather than “chondroma” since these lesions represent tumor-like growths of histologically normal tissue in an abnormal location. Here, we report a case of cartilaginous choristoma that occurred in the external auditory canal in a 9- year-old girl.