The purpose of this study is to examine the effect of forth grades in elementary the environmental-friendly attitude by STSE in elementary lesson. To verify research problem, the subject of this study were forth-grade students selected from two classes of an elementary school located in Ulsan. Post-test showed following results: the research group showed a significant improvement in the environment-friendly attitude of cognitive domain and behavior domain compared with the comparison group. In conclusion, STSE program was more effective than the teacher map based teaching model on environment-friendly attitude. However, since the study has a limit on an objet of the study and the applied curriculum, the additional studies need to be conducted with an extended comparative group and curriculum.