The core value of indigenous tribal tours is to provide deep and unforgettable tourist gaze to visitors. By attracting visitors' visual attention and providing realistic travel experience, an attachment to indigenous tribes can be induced in visitors. Whether the tourist gaze and tourism authenticity can generate further attachment to indigenous tribes among visitors is the foundation of sustainable tourism development. This issue is also significant in relation to the development of indigenous tribal tourism, which requires in-depth investigations. The topic examined in this study is the relationship between the tourist gaze and place attachment. We used the Alishan National Forest Recreation Area as the research subject. The results of this study include the following: (1) Evaluative indices for tourist gaze and tourism authenticity were established based on a literature review and site visits. We identified eight constructs from the factorial analysis results, namely "exotic tribal cuisine culture," "landscape and ecology," "cultural landscape of exotic tribal settlements," "exotic tribal social relationships," "exotic tribal cultural commodities," "exotic tribal imagery," "settlement industries," and "living atmosphere." The evaluative indices for place attachment obtained from factorial analysis were "place identification" and "place dependence." (2) The highest score for tourist gaze was obtained by "landscape and ecology." The highest score for tourism authenticity was obtained by "landscape and ecology." The highest score for place attachment was obtained by "place dependence." (3) According to the results of linear structural equations, tourist gaze has a significant and positive effect on tourism authenticity and place attachment. Tourism authenticity also has a significant positive effect on place attachment. The results of this study can increase the development of tourism by indigenous tribes providing high-quality tourism experiences, strengthen the position of indigenous tribal tours in the minds of visitors, and enhance the performance of indigenous tribal tours.