This research is motivated by observations that show the lack of additional teaching materials in schools that facilitate students in communicating mathematical ideas (symbols, pictures, and graphs) as well as concepts related to fractions by presenting the surrounding environment as a source of learning. The purpose of this study is to reveal the level of validity of mathematics e-modules on fractional material based on the RME approach developed. The type of research used is research and development, and the research model used is the ADDIE model, namely the analyze, design, develop stage, implementation stage, and evaluate stage. The validity sheet is the instrument used in this study. Researchers analyzed validation sheets with a scale of 5 (five) to determine the quality of the e-modules developed. The results of material expert validation got a score of 0.9 with a very valid category; media expert validation got a score of 0.89 with a very valid category; and linguist validation got a score of 0.9 with a very valid category. So that the mathematics e-module on fractional material based on the RME approach is valid and very feasible to be used as a mathematics module, especially fractional material because it has met the assessment criteria.