This study aims to examine the effects of STEAM education on elementary school student`s creativity (creative problem solving, creative personality) and flow on learning. STEAM education is composed of 5 strands: Science, Technology, Engineering, Art, and Mathematics. The STEAM education provides convergence education to explore diverse thinking and achieve future convergence human resources. Previous studies on STEAM education have been done on the model development and concept formulation. There was very little application research. In addition, test subjects were usually middle school and high school students. Therefore, this study focused on the elementary school students to investigate the effect of STEAM lessons. This study made STEAM lesson plans that strengthen the linkages themes among the subjects. It helps students acquire the creative design and emotional experience. Based on this purpose of study, there are two research hypotheses. First, STEAM education Improves creativity (creative problem solving, creative personality) on elementary school students. Second, STEAM education enhances the flow on learning on elementary school students. The subjects in this analysis were 6th graders, two classes from elementary schools. Each class was taught for 45minutes during 8weeks by the same teacher and performed 3tests as time goes by. After the test, we examine the changes in student`s creativity and flow on learning. Creativity was measured by two aspects; cognitive aspect and emotive personality. Applied statistical methods were two independent samples t-test. As the result, there were significant differences in creativity (creative problem solving, creative personality) and flow on learning through the STEAM education. The result indicates that STEAM education was helpful to improve creativity (creative problem solving, creative personality) and flow on learning.