Since the increasing attention among scholars on entrepreneurship education, there is a lack of empirical evidence on how to prepare for entrepreneurial education at an early age. Therefore, this study examines the effect of the outdoor learning environment and entrepreneurial education on entrepreneurial self-efficacy in Indonesia's elementary school students. This study incorporated 320 elementary students in the five and six-year students as respondents in several elementary schools in Jakarta of Indonesia. The sample was gathered using convenience sampling by giving online questionnaires with five scales of measurement. The findings showed that the outdoor learning environment has closely related to entrepreneurship education and entrepreneurial self-efficacy. Second, entrepreneurship education plays a significant role in mediating the relationship between the outdoor learning environment and students' self-efficacy. Our research provides insight to future researchers that primary education plays a significant role in the growth and development of self-efficacy and entrepreneurial intentions.