The aim of this work was to investigate the effect of problem-oriented basic physics modules on improving the critical thinking skills of physics teacher candidate students. The type of research used was semi-experimental in two different classes. The next target of this research was the students of Samudra University's FKIP Physics Graduate Program. The data collection tools and techniques used in this study are basic physics questions that enhance critical thinking through problem-based basic physic e-modules. The results of this study, namely the hypothesis test results, were obtained sig (2-tailed) = 0.000 < 0.05, when testing the hypothesis that H0 is rejected and Ha is accepted. Therefore, it can be concluded that the e-module of basic physics has a problem-based effect on the critical thinking skills of physics teacher candidate students. Effect size value is d = 2.90 > 0.08, so it can be considered high. Therefore, it can be concluded that there is an influence of the electronic module of basic physics using a problem-oriented approach on the critical thinking skills of prospective physics teacher students. This research shows how effective E-modules are in fostering critical thinking abilities.