本文運用第三空間理論探討劇團和埔里在地組織反空污集體行動的影響。主要分析在社會工作與劇場跨領域、學院與社區、日常生活與劇場所生成的第三空間；繼而討論雜揉與協商過程中對學生和社區帶來的影響。研究資料主要從學生和社區團體領導者的觀點，分三階段做質性或量化資料蒐集，包括學生的報告、調查資料和訪談資料。研究發現，在劇場和社會工作跨域的第三空間，有助於學生對社區問題產生新的理解和洞察，並連結學院和社區在地知識，且需要留意參與者情緒和權力議題，雜揉的第三空間提供在地組織和劇團協作和集體行動的機會。

This paper mainly uses the ‘third space’ theory to explore the impact of the collective action against air pollution organized by theater teams and Puli’s local associations. First, I discuss the third space generated between the interdisciplinarity of social work and theater, colleges and communities, and between daily life and theater. Second, I analyze the impact on students and the community during the process of hybridization and negotiation of the third space. The research data was collected in three stages from the perspectives of students and community leaders, including students’ reports, surveys and interview data. I found that the third space of interdisciplinarity between theater and social work helps students to develop new understanding and insights into community issues and to rearticulate college and local knowledge. However, it is necessary to pay attention to participants’ emotions and power issues. The hybridity of the third space provides opportunities for local organizations and troupes to collaborate and act collectively.