There are approximately 1,000 patients who undergo mastectomies each year in Korea. However, there is no company who manufactures mastectomy brassieres and breast prosthesis in Korea. The purpose of this study is to evaluate the wearing conditions of the imported mastectomy brassieres with breast prosthesis and to develop the better-fitted and comfortable mastectomy brassieres in reasonable price. 254 patients participated in this survey. In the results of our survey, 117 out of the 254 patients were wearing mastectomy brassieres and breast prostheses, which have been imported mostly from USA. The degree of satisfaction at wearing mastectomy brassieres was low. The patients generally feel hot when wearing mastectomy brassieres, specially in summer and also pointed out the heavy weight of breast prosthesis and the discomfort in wearing mastectomy brassiere for a long period of time.