Seborrheic Keratosis(Senile wart) is a proliferation of basal cells with the formation of epithelial cysts and hyperkeratosis. The lesions are frequently multiple and occur on the forehead, cheek, nape of the neck, and upper back, usually over 50 years of age, becoming the most common cutaneous tumor of the older age group. They are almost always benign but should be excised if the diagnosis is in question. Recently, the authors experienced a case of seborrheic keratosis occurring in external auditory canal on the 64 years old female patient. The authors report about this patient with the review of the literatures.