Along with the increasing number of female athletes and the changing conception of physical education, gender studies in the area of physical education and sports are no longer limited to the male/female discrimination. The boundary between male and female athletes should be reconsidered. Adopting a feminist approach, the purpose of this study was to investigate gender identity of a Taiwanese female athlete as she studies to become a professional practitioner. Since gender roles of female athletes constantly change according to social, political, cultural, and economical contents, this case study interrogates how social structure and cultural traditions continuously shape gender identities. Sharon, a collage female athlete in Taiwan, participated in this case study. She has played sports since eleven years, and she is a sports shooter in Taiwan. A variety of research techniques were employed in this case study, including a semi-structured interview, several informal interviews, observations, and fieldnotes. Data were analyzed with the use of "the mirror" perspective of feedback and comparison for the refinement or change of emergent themes (Shank, 2002). This study examined the public stereotypes of a masculine female athlete in current Taiwan's society and the self-image of a Taiwanese female athlete constructs. It discovered a curious position where the public stereotype of a female athlete and her self-image conflicts, an ambiguous identity termed “third sex” in the study. This denotes a theoretical counterpart of the traditional female/male discrimination. Female athletes are a relatively new phenomenon in Taiwan's society and problems concerning their struggles with personal identities are rarely investigated. This study attempts to encourage more research studies in this area. Keyword(s): athletics/sports, gender issues, professional development