This study aims to examine the influence of school principals' visionary leadership on teacher performance, both directly and indirectly through work motivation and innovation as mediating variables, among teachers at State Vocational High Schools (SMK Negeri) in Gowa Regency, South Sulawesi. Teacher performance is a critical driver of vocational graduates' readiness for the workforce, yet preliminary data indicate uneven school-industry partnerships, low participation in industrial internships and professional training, limited graduate-level qualifications, and underutilized project-based learning across the five state vocational schools in Gowa Regency. This research adopts a quantitative, explanatory design grounded in the positivist paradigm. The population comprises 508 teachers from five State Vocational High Schools in GowaRegency, from which a sample of 224 respondents is determined using the Slovin formula and drawn through proportionate stratified random sampling. Primary data will be collected through a five-point Likert-scale questionnaire distributed via Google Form, complemented by secondary data from school records. Data will be analyzedusing Structural Equation Modeling based on Partial Least Squares (SEM-PLS), with hypothesis testing based on T-statistic and P-value criteria derived from bootstrapping. Seven hypotheses are proposed to test the direct effects of visionary leadership on teacher performance, motivation, and innovation; the direct effects of motivation and innovation on teacher performance; and the mediating roles of motivation and innovation in the relationship between visionary leadership and teacher performance. The study is expected to provide empirical evidence on the mechanism through which visionary leadership enhances teacher performance in vocational education, and to offer practical recommendations for school principals, teachers, and the Regional Education Office in strengthening leadership practices, motivation programs, and an innovation culture at State Vocational High Schools in Gowa Regency.