Taiwan, as the most LGBT friendly Asian Country, has witnessed its almost successful marriage equality (herein after as "ME") movement in the Legislature in the end of 2016. The 2016 ME legislative movement is distinctive from the past ones in a few ways: powerful mass movement, more LGBT groups involved, and opponents’willingness to give in to conferring a partnership status to same sex couples. But most importantly, more LGBT families than ever came out of the closet to participant in the 2016 ME legislative movement. LGBT families participated in the movement in different phases: some in the phase of drafting the bill, some in the phase of internal discussion, and others in the phase of advocacy. Th paper purports to understand why LGBT families decided to participate in 2016 ME legislative movement, how they decided, through what path and in what way they participated. This project will conduct in depth semi-open structured interviews on LGBT families who participated in the movement. Through analyzing the cause and process of the decision-making, this paper will explore how law and social movement group play a role in people's decision in participating social movements.     

Keywords: social movements, Marriage Equality, LGBT family, Same sex Marriage, law and social movements, legal mobilization

1998年底，祁家威因欲與同性伴侶公證結婚遭拒，開啟了台灣第一起爭取婚姻平權的案例，近二十年後於2016年，婚姻平權運動以法案方式進入立法程序，受到司法法制委員會的支持並完成審查。在過去的婚姻平權立法運動，有些同志父母（子女為同志的父母）相當積極投入，但以同性伴侶為核心並生養子女的同志家庭在過往則參與較少。然而在2016年的立法運動中，卻到處可見同志家庭的身影，形成了特殊的現象。同志家庭在這次立法運動中的參與包括法案草擬階段的參與、法案溝通階段的參與及立法倡議階段的參與，本文透過訪談在不同階段參與立法運動的同志家庭，從各個同志家庭的生命經驗出發，探討民法親子相關規定對同志家庭的意涵，並進而探究以家庭為單位投入運動的原因、決定形成和過程之體驗，了解家庭作為運動參與者之過程，以及探究其所屬的團體如何影響家庭參與之決定和行動，並著重探討法律在運動參與的決定中，究竟扮演如何的角色。