The aim of this study was to investigate the effects of project-based learning on the learning achievement and satisfaction of undergraduate learners in General Psychology. The study included 30 undergraduate students enrolled in a general psychology class. The research utilized a project-based learning management plan, a learning achievement test, and a satisfaction questionnaire as the instruments. The results of the study revealed significant positive impacts of project-based learning on both the learning achievement and satisfaction of students in the context of general psychology. These findings highlight the effectiveness of project-based learning in enhancing students' learning outcomes and overall satisfaction in the field of general psychology. The study contributes to the existing body of literature supporting the benefits of project-based learning as an instructional method for undergraduate education.