Mental peace is a state of inner balance and tranquility in which an individual feels security, satisfaction, and calm. This state helps the individual cope with tensions, stresses, and life pressures more effectively and achieve better physical and spiritual health. Mental peace not only improves personal health but also enhances the quality of social relationships, as well as occupational and academic performance. From a religious perspective, mental peace is recognized not only as a natural need but also as an achievement of faith and a connection with God, as emphasized in the Quran and Hadith. The purpose of this article is to examine strategies for attaining mental peace based on religious sources and Islamic teachings. This study has been conducted using a descriptive-analytical method, reviewing sources such as the Quran, Hadith, and the works of religious scholars. The research results indicate that, according to religious teachings, factors such as prayer (Salah), supplication (Dua), patience, hope in divine mercy, and practicing moral virtues are key strategies for achieving mental peace. Finally, the findings demonstrate that religious teachings, as a rich source, can assist in the formation and strengthening of individuals' inner peace and serve as a valuable guide for reducing stress and the anxieties of life.