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The paper explained about the profile of students creative thinking skill in designing optical tool prototype. The research method used mixed method with explanatory sequential design model. The research design was experimental design. Subject of this study consist of 22 students on the 11th grade at one of Senior high school in Jambi. Students were assigned to design prototype which is the problem solution of optical tools practice. The instrument of assessment design used in this research was assessment of design process that consist of 5 assessment aspects that implicated STEM field (Science, Technology, Engineering, and Mathematics). The result of this study showed by using STEM approach method, students can think creatively in the process of design with percentage rate around 66,25%.