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This research aims to develop assessment to measure critical thinking skills of students based on indicators of critical thinking by Facione. This assessment is developed using two tier multiple choice test. The spesific objectives of the development assessment aimed to find out the characteristics and feasibility of critical thinking assessment which is able to measure critical thinking skills of high school students. This study employed Borg and Galls modified Research and Development. The sample used in this research include 2 expert validators, 1 prctitioners, 15 students in limited test, and 58 students in field test. Data analysis was carried out using Quest program. The result of research showed that the characteristics of critical thinking using two tier multiple choice have validity test fit to Rasch model, and high reliability, the feasibility has very good validity of content and construct, done by evaluation and material validators, it has difficulty level of 28% difficult, 60% moderate, 12% easy in the first tier, and 10% difficult, 70% moderate, 20% easy in the second tier, with average standard deviation good enough both first and second tier.