This study aims to examine humanistic theory and its application in PAI learning in Senior High School. The research method used is library research with a qualitative approach. Data were obtained from literature study and document analysis related to humanistic theory and PAI learning in schools. Data processing and analysis techniques used the content analysis method to measure the level of accuracy of the message and draw conclusions. The steps applied are descriptive, content analysis and correlative. The results showed that humanistic theory can be applied in PAI learning by prioritising aspects of personalisation, empowerment, and experience. The application of humanistic theory in PAI learning can increase students' motivation and learning achievement, as well as help students to develop their full potential, both from psychological, physical, emotional and spiritual aspects. At the same time, transformational leadership in the school environment can play an important role in creating a positive learning climate. Transformational leadership, which emphasises motivation, inspiration and development of students' potential, is in line with Maslow's idea of self-actualisation. Therefore, this study will discuss the application of Maslow's humanistic learning theory and transformational leadership in PAI learning in Senior High School.