The aim of the study was to investigate the validity level of Socrates-based linear algebra e-module, both material validity and design. This is a research and "development" (R&D) with ADDIE procedure: analysis, design, develop, implement, and evaluate. The participants were 30 students and 2 lecturers who supervised linear algebra courses in the mathematics education study program of Universitas Muhammadiyah Metro. Data collection techniques uses questionnaires provided to material and design validators. Data analysis uses quantitative descriptive. The results showed that the validity rate x of Socrates-based linear algebra e-modules on material aspects was 81.33% with highly valid categories and on design aspects 88% with highly valid categories. Based on the results of the study obtained the conclusion that the e-module algebra linear based on Socrates is declared very valid. Furthermore, further research can be conducted related to the use of Socrates-based linear algebra e-modules in learning to find out effectiveness of using e-modules.