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This research aimed to describe students critical thinking ability in solving contextual problem. Research population were students class VIII SMP Muhammadiyah 3 Bandar Lampung. Subjects used in this research were 29 students chosen with simple random sampling. Method used was descriptive. Data were analyzed qualitatively and quantitatively. Data of critical thinking ability was essay question with contextual problem of flat geometry The result of the research showed that student-s critical thinking ability was still low. It can be seen from fulfillment of each indicator of critical thinking ability. Interpretation aspect was in moderate category of 55%, analysis aspect was 38% and evaluation aspect was 21% including in low category and interference aspect was 14% in very low category. The conclusion in this research was that student-s critical thinking ability was in low criteria. Thus, it needed innovation way of learning to facilitate students- critical thinking ability.