This academic article on Instructional Leadership of the administrations in the Digital Age by using a documentary research method, the authors analyzed and synthesized into a new body of knowledge from the ideas of 20 academics both in Thailand and abroad with the objective to present the concept of instructional leadership of school principals in the digital era. This new body of knowledge can be used to inspire school administrators to apply them in educational administrations in educational institutions in the context of Thailand in the digital era with high quality. In this paper, the body of knowledge will be presented, consisting of.1. Definition of instructional leadership of school administrators, 2. Components of Instructional leadership of school administrators, 3. Guidelines for educational administration in the Digital Era, and 4. Summary of instructional leadership components of the administrators in the Digital Era: 1) Having a shared vision for digital, 2) Creation of digital networks for academic cooperation, 3) Professional development of teachers in the digital era through PLC process, 4) Curriculum and learning management with technology, 5) Using digital technology for learning, 6) Learning culture Knowledge in the digital age, 7) Research for innovation development to enhance achievement,. 8) Effective communication skills, 9) Promotion of learning atmosphere, 10) Creativity, 11) Supervising, monitoring and reflecting on learning outcomes, 12) Inspiring a digital organization, 13) Spiritual leadership and 14) Building a quality base for education towards sustainability. We hope that both public and private educational administrators can apply it in instructional administration which is the heart of the school management in order to achieve excellence and towards international and world class schools.