The purpose of this study is two-fold. First, it investigates the self-images of science teaching held by early childhood pre-service teachers who took constructivism early childhood science education courses. Second, it analyzes what aspects of those courses influenced these images. The participants were eight pre-service teachers who took these courses during the spring semester of 2013 at universities in Korea and the United States. A Draw a Science Teacher Test Checklist (DASTT-C), questionnaires, individual interviews, researchers' field notes, and participants' documents were collected. The results showed that four participants who displayed teacher-centered images before taking the courses changed to child-centered images after the courses. The factors that influenced those images were changed perspectives of a teacher's role and experiences of constructivism-based science teaching for young children. The other four pre-service teachers who held child-centered images before the course solidified child-centered images after the course. The influences on those images were learner-centered learning experiences and experiences with constructivism-based science teaching for young children. This result implies that early childhood science education should provide opportunities for pre-service teachers to reconstruct their own views about science teaching in order to learn and teach based on constructivism.