The purpose of this study was to investigate the effects of science lesson applying STEAM education on the creative thinking activities and emotional intelligence of elementary school students. The study subjects were two classes of the 3 th grade of S elementary school in B Metropolitan City. One class including 26 students was experimental group and the other including 27 students was comparison group. For the purpose of study, the lesson unit 'The world of animals' was practised, the reorganized unit applying STEAM was applied to experimental group, whereas comparison group was taught traditional science lesson. The results of this study were as follows. First, the science lesson applying STEAM education influenced significantly the improvement of the creative thought activities of elementary school students. Second, the science lesson applying STEAM education influenced significantly the improvement of the emotional intelligence of elementary school students.