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Abstract. This descriptive research aims to figure out students reflective thinking ability at the quadrilateral material. The subjects of this research were SMP students involving 32 seventh grade students at SMP Muhammadiyah 3 Bandar Lampung. The Data was taken through reflective thinking ability test which consists of 4 math story problem that involved 3 indicators of reflective thinking, namely reacting, comparing, and contemplating. In order to obtain a comprehensive description related to the ability of reflective thinking students, the data was qualitatively and quantitatively analysed. The result of the research shows that students reflective thinking ability are still not optimal. It can be seen from the majority of students who still get difficulties in building a deep self-understand of problem, inability to deliver what has been understood in a certain reason, as well as inability in concluding a proper answer.