Islamic boarding schools (pesantren) face the challenge of maintaining their Salaf educational identity while responding to institutional modernization, demands for educational quality, and increasing expectations for public trust. Although previous studies have examined kiai leadership, quality management, and Sharia marketing, these dimensions have largely been discussed separately, leaving limited understanding of how adaptive kiai leadership integrates them into a coherent governance model. This study aims to reconstruct an adaptive kiai leadership model in modern Islamic boarding school governance through the synergy of Salaf tradition, quality management, and Sharia marketing, with Pondok Pesantren Cadangpinggan, Indramayu, Indonesia, as the case study. A qualitative case study design was employed involving 15 informants selected through purposive sampling, comprising the kiai, pesantren administrators, school principals, teachers, administrative staff, students, alumni, and community representatives. Data were collected through semi-structured interviews, participant observation, and document analysis, and analyzed using data condensation, data display, and conclusion drawing/verification. The findings reveal three interconnected dimensions of the reconstructed model: the preservation and adaptive development of Salaf educational values, the institutionalization of continuous quality management, and the implementation of ethical Sharia marketing through institutional credibility and community engagement. These dimensions do not operate independently; adaptive kiai leadership functions as the strategic mechanism that connects internal educational quality improvement with external ethical communication, thereby strengthening institutional reputation, public trust, and organizational sustainability. The theoretical novelty of the study lies in positioning adaptive kiai leadership as an integrative mechanism that reconciles religious authority with managerial and strategic institutional development. Practically, the model provides a governance framework for pesantren to pursue modernization and competitiveness without compromising their religious identity.