This research aimed to produce mathematical creativity-based learning media on geometry using valid Adobe Flash CS6 for junior high school students, find out the teacher and student's response toward the learning media. This was a research and development that used Thiagarajan, Semmel dan Semmel (4D) development model including define, design, develop, and disseminate, but the software development in this research only reached the develop step. On the develop step, the learning media was tested by the validator until it was valid or proper to use for the learning process. The test was done on Class VIII K of SMP Muhammadiyah Cilongok. The results of this research showed that the learning media had been valid with an average score 4.18, the average score of teacher's response was 4.89 and the average score of student's score was 4.48. So, it could be concluded that the learning media had a very positive response from the teacher and students.