We conducted a questionnaire survey on 344 females who suffered from breast cancer to investigate their problems with clothing after breast cancer surgery. In this study, we focused on the use of brassieres and the inconveniences they caused.The results obtained were as follows:1) More than half the participants felt there were difficulties and inconveniences associated with their brassieres, such as an imbalance of the two breasts, crawling up of the cups, and a humid sensation inside the bra cups, all of which were more often found amongst the participants who had undergone a mastectomy.Difficulties and inconveniences of bras, such as tightness under the bust, slipping down of the shoulder straps, and pain from abrasion were more often found in the participants who had undergone a breast conserving surgery. The first step we should take in solving these problems is to sort out the relationship between the inconveniences of bras and the diversity of the deformity and wounds in the breast area.2) We examined the connection of the inconveniences of bras with the physical symptoms and side effects of breast surgery. The results suggest an urgent need to provide patients with not only better bras but also other clothes ranging from innerwear to outerwear.3) The bras used were classified into three types: exclusive bras for breast cancer patients, ordinary bras different to the ones used before surgery, and the same bras as those used before surgery. The exclusive bras were shown to be easy on the body and were highly ranked except for moisture and hotness inside the bra cup. We believe this result was achieved through the use of silicon pads. The results for bras different to the ones used before surgery tended to show the greatest inconveniences, suggesting a need for more information in order to improve the comfort of bras after surgery.