Representative bureaucracy is not only a political instrument for enhancing governing legitimacy but also a practical tool to increase organizational performance. This paper examines the passive representation of women civil servants in administrative agencies across all level of governments since 2000, which is one of the most politically attractive issues in Taiwan. The results show that the percentage of women has been continuously increasing to over 60% when excluding law enforcement officers. This level of passive representation is the highest among all other Asian countries and close to the mean of Western nations. Yet, there clearly exists job segregation or a glass wall between genders, on the one hand, and more importantly women have been significantly underrepresented in senior managerial or executive positions, reflecting the problem of a glass ceiling, on the other. This paper discusses some plausible reasons contributing to the trend as well as several implications for personnel policy and the issue of gender mainstreaming. It argues, among other things, that the priority task is to establish a leadership development program and selection plan for women that will enable political executives to appoint more women to higher civil servant positions.