本文主要藉由人文地理學者對「區域」的定義，討論與東臺灣和東臺灣內部區域劃分相關的議題。文章首先簡介區此概念在地理學界的發展，再試著討論東臺灣研究者的相關論述中，對東臺灣做為「區域」的內涵。區域概念的回顧部份，包赫伯遜、白蘭士、騷爾、金伯爾、哈吉爾斯蘭德、吉登司等人的論點。東臺灣研究者的相關論述部份，係以東臺灣研究會出版的專書、論文為討論對象。

The paper aims at discussing the related issues from the discipline of geography on the demarcation of region based on East Taiwan as a case. I start to provide a general introduction on the changing concepts of region in the field of geography, and further endeavor to explore the regional nature of East Taiwan based on the associated discourses generated by the researchers on East Taiwan. The paper mainly reviews the regional concepts developed or argued by A. J. Herbertson, Paul Vidal de la Blache, Carl O. Sauer, G. H. T. Kimble, Tortsen Hagerstrand, Anthony Giddens and so on. I then choose the monographs and journal articles published or sponsored by the research community Eastern Taiwan Studies to discuss how researchers utilize the idea of region in their studies.