對政黨而言，黨員是相當重要的資產。政黨黨員協助政黨推動平時政務，也於選舉期間協助競選工作的推動，沒有黨員，政黨難以展現其存在性。是以，黨員的重要性，無庸置疑。本文藉由分析國民黨中央和地方黨部的深入訪談資料和調查資料，試圖探索誰是國民黨黨員？加入政黨的原因為何？國民黨黨員參與政黨活動的情形為何？根據分析資料顯示，過去十年來國民黨的黨員人數逐漸增加，展現國民黨在吸收支持者方面的動員能力。整體而言，國民黨黨員年齡高於一般選民，性別方面以男性居多，此也反映出黨員和選民之間的年齡和性別的差距。多數黨員表示是基於認同政黨的理念和議題政策而加入國民黨，然而團結凝聚性誘因和物質性誘因在吸納黨員方面也扮演著一定的作用。黨員的參與度因不同地方黨部而所不同，也和黨員年齡和國民黨於該地的政治實力而有所差異。在非都會區的黨員參與度較都會區來得高，年長的黨員參與情形也較為積極，國民黨選舉優勢區的黨員參與情形也較高。

Party members are important assets to a political party, for without their help in running the daily affairs and campaigns, a party cannot be seen to exist. Therefore, there is no doubt that the party members are important. By analyzing data from in-depth interviews with central and local party branches, as well as questionnaires directed at party workers, this article aims to examine who the party members of the Kuomintang (KMT) are. Why do they join the party? What is the level of involvement of the members. The data reveal that KMT membership has been increasing steadily over the past decade, which indicates the KMT’s capacity to draw support from voters. In general, KMT members tend to be older than the electorate on average, and most of them are male, reflecting that gender and age gaps exist between the KMT members and the electorate. While many KMT members are motivated by the party’s ideas and issue orientations, to some extent, solidary incentives and material incentives also play a role in recruiting new members. The level of activism varies among the different local branches, with different degrees of participation in terms of age, region, and the party’s political strength being found. Members in rural areas participate more than those in the cities, while older members participate more than the others. Members also participate more if the KMT retains a dominant status at the national level or in the local districts.