Many women participate the labor market nowadays, but family obligation, socio-economic situation and gender culture make them stay at the bottom of the labor market. These factors also affect the part-taking of women in the union, thus the union that is supposed to stand up for labor rights is full of male perspectives and ignores the existence of female workers. This study examines the flight attendant members of one airplane industrial union through qualitative research which includes context analysis, in-depth interview and participant observation. These research questions have been proposed: Why do women participate the union? What kind of roles do they play? And what kinds of factors affect their union participation and experiences? Women’s action comes from economic cause. From their action, they recognize their own positions and roles in the union. This study pinpoints that the patriarchy of the capitalism inside the enterprise has put the female flight attendants in a very difficult position in the enterprise as well as in the union. Female members are pushed to rely on their male representatives. The uniondominated by male members narrows down the possibility of struggle. Although the basic labor conditions of female workers are under protection, female workers are trying to propose some issues of their concerns, such as maternity leave and sex harassment. Recommendations on organizing female workers are proposed: The organizers should be sensitive to the unique network among female flight attendants, and be innovative to recruit female workers into the unions.