This study analyzes the role of Islamic Religious Education (PAI) teachers in fostering students' mental development at SMP Negeri 2 Indralaya Selatan, examines the challenges encountered, and evaluates the outcomes of teachers' efforts in enhancing students' mental well-being. Employing a qualitative approach, this research involves observation, interviews, and documentation to gather comprehensive data on students' experiences and teachers' interventions. The findings reveal that PAI teachers play a crucial role in students' mental development through spiritual guidance and religious activities such as congregational prayers, religious extracurricular programs (rohis), lectures, and moral discussions. These activities assist students in managing emotions, building self-confidence, and shaping positive behavior. Teachers serve as role models in character development, imparting religious values to reinforce students’ moral foundations. Furthermore, PAI teachers encourage active participation in religious activities, which significantly influences students' social interactions and academic performance. However, several challenges persist, including students' reluctance to be open, low learning motivation, and negative social influences. Despite these challenges, students demonstrate behavioral improvements such as increased discipline, honesty, patience, empathy, and greater engagement in religious and academic activities. The study concludes that PAI teachers play a vital role in shaping students’ mental well-being by instilling strong religious values and continuously reinforcing positive character development. Their professional and dedicated approach ensures that students are better equipped to navigate social and academic pressures, fostering overall personal growth.