We report here two cases of clear cell hidradenoma. The first patient was a 19-year-old adolescent, who had single, pinkish, nodule on the left cheek for 1 year. The second case of 70-year-old woman had multiple projecting, pinkish tumor mass with serous discharge on the right inframammary area for 20 years. On histopathological examination, we could observe polyhedral cells and clear cells with tubular differentiation in both cases and large cystic changes due to tumoral degeneration in the second case, The tumor masses were excised, and have not recurred. (Kor J Dermatol 1996;34(2): 300-303)