Pesantren play a central role in Islamic education in Indonesia through curricula rooted in classical Islamic traditions. One of the dominant models is the Al-Salaf al-Ṣāliḥ curriculum, which emphasizes theological orthodoxy, textual memorization, and moral discipline. However, empirical studies examining its influence on students’ religiosity in contemporary contexts remain limited. Purpose. This study aims to investigate the correlation between the implementation of the Al-Salaf al-Ṣāliḥ curriculum and the religious attitudes of students (santri) at Pesantren Tunas Santri. Method. This study employed a quantitative correlational design. Data were collected from 120 santri selected through stratified random sampling using standardized instruments measuring curriculum implementation and five dimensions of religiosity. Data were analyzed using Pearson correlation and regression analysis. Findings. The findings indicate high levels of curriculum implementation (M = 4.21; SD = 0.43) and student religiosity (M = 4.08; SD = 0.49). Pearson correlation analysis shows a significant positive relationship (r = 0.624, p < 0.001), while regression analysis reveals that curriculum implementation explains 39% of the variance in students’ religious attitudes. The curriculum strongly influences ritualistic and ideological dimensions, although its impact on intellectual and experiential dimensions remains limited. Conclusion. This study concludes that the Al-Salaf al-Ṣāliḥ curriculum significantly contributes to strengthening students’ religiosity in pesantren education. Originality. This study provides empirical evidence on the effectiveness of a traditional pesantren curriculum in shaping contemporary student religiosity.
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