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This research is a qualitative descriptive research. Data analysis has been used is Miles and Huberman Methods. The result of the research shows that: the level of ability of mathematical creative thinking is at the level of 'medium' creative thinking ability; at the preparatory stage, students have prepared themselves to solve problems by learning to think, seek answers; at the incubation stage, searching and gathering data/information; at the stage of illumination, raises new ideas; until at the verification/evaluation stage; the analysis of the difficulty of the mathematical creative thinking process of this research is the difficulty in applying the principles and problem solving. Then, there is the inability to detail problem-solving characterized by the difficulty of principles and procedures that include the inability to plan the settlement, the inability to engage in the discovery, the inability to abstract patterns, the inability to express the meaning and not apply the principle. In addition, the inability to give many ideas, the inability to solve problems from different perspectives, the inability to solve problems in one's own way, and the inability to develop or detail in a situation; students activity are effective so that learning by applying Problem Based Learning Model provides an opportunity for students to explore various answers and ways of completion with attention to aspects of fluency, flexibility, originality, and elaboration. Keywords—creative thinking, problem based learning

Analysis of the Difficulties of the Mathematical Creative Thinking Process in the Application of Problem Based Learning Model