跨性別，指的是對自身性別認同與原生理性別不一致。本文探討跨性別者的社會與醫療的困境。 由於社會對性別採取「性別二分主義」，文化、制度皆執著於非男即女的配置，造成無法接受跨性別者的 處境。對跨性別者而言，醫療就好比是雙面刃，既是鞏固性別二分主義成為「矯治不正常」的專業，卻 也可以協助部分跨性別者打造自己理想中的身體形象。英國於2004年通過「性別承認法」，跨性別者無 須性別置換手術即准予變更性別身份的法案，引領世界風潮。目前台灣也正在往修法的路上前進。本文 透過討論與跨性別者相關的法律、醫療，以及其日常生活經驗與二個個案的手術經驗，使讀者可以理解 跨性別者面對的社會壓迫，以及其應對的策略，藉此也反思現有法律、醫療制度改善的可能。

Transgender refers to gendered identity of oneself which is inconsistent with the biological gender of oneself. This article explores the social and medical predicaments of transgender. It derives from the “sexual dimorphism” which creates the culture and social system which only recognizes male and female, and refuses the recognition of transgender. For the transgender, medicine is regarded as a double - edged sword. On the one hand, it reinforces the “sexual dimorphism’’ and become the tool for correcting “abnormality’’. On the other hand, it assists some transgender to reshape their desired sexual bodies. The British “Gender Recognition Act’’ in 2004 has led the sea changing of the world; the transgender could change their gender status without going through any surgery. Now Taiwan is on its way towards liberalized legal revision. The article discusses the law, medical care and daily experience of the transgender in Taiwan in general and two cases on the experience of gender surgery in specific, it aims at deepening the understanding about the social predicaments of the transgender and their coping strategies, so that the readers could reflect the possibility of improving the legal and medical system.