This study has aims to describe the profile of junior high school students’ thinking in solving math problems. Using Polya’ problem solving steps is understanding the problem, devising a plan, carrying out the plan, and looking back. This is a descriptive research with qualitative approach. The subjects of this research are three students of high, medium and low in mathematical ability based on results mathematics ability test. Data collection methods are task-based interviews. Students of high, medium, and low mathematical ability were thinking relatively similar. Understanding the problem: they received information by reading problems, they recalled information about known notions and being asked; they processing information linked information received with prior knowledge, and they stored information by saying back and writing down what is she known and asked. Devising a plan: they processed information by linking prior knowledge with information received; they stored information by making mathematical models, And they recalled information by explaining previous knowledge. Carrying out the plan: they recalled information that has been planned; they processed information using numerical and algebraic counting operations, they stored information in the planned manner. In looking back: they stored information by performing a repetition of steps to implement the settlement plan.