This study aims to find out the process and quality of the development of guided discovery-based teaching material on real analysis course which meets valid, practical, and effective criteria. The type of research is Research and Development with reference to ADDIE instructional development model. The product developed is the form of teaching material, which is a guided discovery-based teaching material in real analysis courses. The subjects of this study were students of the Department of Mathematics Education UIN Alauddin Makassar class of 2017. The instruments used were expert validation sheets, student and lecturer response questionnaires, student activity observation sheets, observation sheets of teaching material implementation, and learning achievement tests. Referring to the results of the research conducted, it was found that the process of developing teaching materials in this study using the ADDIE instructional development model included five stages, namely analysis, design, development, implementation, and evaluation. The development of guided discovery-based teaching material on real analysis course of students of the Department of Mathematics Education UIN Alauddin Makassar has met the criteria of validity, practicality, and effectiveness.