Reading interest plays an important role in supporting students’ literacy development and academic achievement, particularly at the elementary school level. However, the rapid advancement of digital technology has influenced students’ learning habits, resulting in decreased interest in printed reading materials. Data from UNESCO indicate that Indonesia’s literacy rate remains relatively low, while reports from We Are Social show that Indonesian children spend a significant amount of time using digital devices each day. Therefore, innovative and engaging instructional media are needed to increase students’ reading interest. This study aims to analyze the implementation of Pop-Up Book media in improving the reading interest of fourth-grade students at SD Negeri 1 Rantepao. The study employed a mixed-methods approach involving 20 students. Data were collected through observation, interviews, tests, and documentation. The results showed a significant improvement in students’ reading interest after the implementation of the Pop-Up Book media. The use of three-dimensional visual elements in Pop-Up Books successfully increased students’ engagement and participation in reading activities. These findings suggest that Pop-Up Book media can serve as an effective and innovative instructional strategy to enhance students’ reading interest, particularly in elementary school literacy learning contexts.