This research is motivated by the lack of learning activities and students' mathematical problem solving abilities. The purpose of this research is to know the increase of activity and problem solving ability of student mathematical with use of 7E learning model (Elicit, Engage, Explore, Explain, Elaborate, Evaluate, Extend). To be more focused this study examines: (1) Student activity using 7E learning model; (2) students' mathematical problem solving skills by using 7E learning model in each cycle (three cycle); (3) Student response to mathematics learning using 7E learning model. This research uses qualitative and quantitative approach, with classroom action research method. The study was conducted in class IX SMP Muslimin 5 Bandung with 34 students on learning material Curved-face three-dimensional objects (cylinder and cone). Instruments used were formative tests, observation sheets, and student response questionnaires. Based on the results of processing and data analysis the researcher obtained three conclusions. (1) Student activity increase with use of 7E learning model in each cycle, (2) Student mathematical problem solving ability increase with use of 7E learning model in each cycle, (3) Student show positive response to 7E learning model.