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In this globalization era, 21st century learning should be implemented such as STEM-based learning with varied instructional material that involved the integration of Science, Technology, Engineering and Mathematics (STEM) to help students in mastering 21st century skills. The purpose of this research was to investigate the effect of STEM-based module on sound wave topic through the improvement of students- creative thinking. The method that used in this research was weak experimental research and the design was one-group pretest-posttest design. The sample was taken by simple random sampling technique which involved 31 students from the population of 8th grade students at Junior High School in Bandung. In order to measure the improvement of students creative thinking, pre-test was given before implementing STEM-based module and post-test was given after implementing STEM-based module. The result of the research showed that based on the analysis of the students- creative thinking results, the average N-Gain is 0,71 which categorized as high improvement. The result indicated that there were improvement of students- creative thinking skills. Based on the result, the research on STEM-based learning in other topics such as energy, optics and electricity were recommended.