本文主要在探討蛇郎君故事的姊妹情結。故事中，妹妹自願嫁給蛇郎君，蛇郎君富有，必定引起姐姐的嫉妒；其中有姐姐對未嫁或嫁不到好人家的恐懼，也有對富有婚姻的渴求，透露身為傳統女性的悲哀。其中的父親角色大多是窮人，在臺灣故事中則常見撿豬屎的，反應了早期社會的生活形態。臺灣的蛇郎君故事，妹妹死後變形，最後常常變成紅龜粿。紅龜粿是臺灣年節喜慶的傳統糕點，有其文化上的意涵，而妹妹變成廚房中或灶上的一個紅龜粿，其中似乎是妹妹主中饋地位的重新擁有。本文試圖從這些面向來觀察具有臺灣特色的蛇郎君故事。另外，筆者也將蛇郎君故事與日本、歐洲的近似故事比較，凸顯姊妹手足的相爭糾葛情結一直是故事的核心母題，手足的相爭也代表了民族性中的家族觀念，姊妹即使出嫁仍與娘家密切往來，她與原生家庭的紐帶始終保持著。

This paper was aimed to discuss the sister-sister complex in the snake husband story of Taiwan. In Taiwanese version, the younger sister married Snake husband voluntarily, while Snake husband's wealth would make the older sister jealous for sure. In the story, the older sister feared for spinsterhood and not being able to marry into a good family, which meant her eagerness for a wealthy husband and her misfortune of being a woman in a traditional society. The father character was often a picker of pig manure, which reflected the lifestyle in early Taiwanese society. When the younger sister died, she would turn into ＂Red turtle cake＂, a traditional dessert of cultural meaning for the special Taiwanese occasions such as New Year or holidays. When the younger sister turned into ＂Red turtle cake＂ in the kitchen or on the top of the kitchen range, it seemed that she had regained the domineering role of the house. This paper attempted to examine the Snake husband story characteristic of Taiwan from different perspectives. In addition, the author compared the Taiwan's Snake husband story with other similar stories in Japan, South Korea or Europe to reveal that the sibling or sister-sister complex has been the core theme of Taiwanese stories. Sibling rivalry also reflected the family ideas in our national character, in which sisters would still have intimate relationships with their maiden home after their marriage.