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This study aims to determine the effect of the Problem Based Learning (PBL) model assisted by Augmented Reality (AR) technology on students' learning outcomes in the Basic Concepts of Science course at the Primary School Teacher Education Program (PGSD) of Muhammadiyah University of Enrekang (UNIMEN). The Problem Based Learning model is known for its ability to develop students' critical thinking, problem-solving, and collaboration skills. Meanwhile, Augmented Reality as a learning medium provides a more interactive learning experience and facilitates the understanding of abstract concepts in the Basic Concepts of Science course. The sample in this study consisted of Class A and Class B, selected using purposive sampling techniques. This study employed a quasi-experimental method with a pretest-posttest control group design. Data on students' learning outcomes were collected using test instruments that had been validated for reliability and validity. Data analysis was conducted using statistical tests to compare the learning outcomes between the two groups. The results showed that the average pretest score of the experimental group was 58.07, while the average post-test score was 85.32. In contrast, the control group had an average pretest score of 51.60 and a post-test score of 64.35. Hypothesis testing using the T-Test revealed a p-value < 0.05 at a 5% significance level, indicating a significant difference in the average learning outcomes scores. Thus, it can be concluded that the Problem Based Learning model assisted by Augmented Reality has a positive impact on students' learning outcomes in the Basic Concepts of Science course.