This study was aimed to determine the effect of MMP learning model assisted by GeoGebra towards students’ mathematics problem solving. The design of this study used post-test only control group design. The population of this study was eighth grade studens at SMPN 2 Mendoyo in academic year 2019/2020 namely 222 people were distributed into 7 classes. The data of students’ problem solving ability were analyzed using One Way ANAVA test and further test using Scheffe test with a significance level of 5%. The analysis showed that : first, there were differences in problem solving ability between the experimental class 1, experimental class 2 and the control class; second, the mathematical problem solving ability of experimental class 1 was higher than the control class (Fhitung =27,14636 > F’= 6,2); third, the mathematicasl problem solving ability of experimental class 2 was higher than the control class Fhitung =7,3 > F’= 6,2); fourth, the mathematical problem solving ability of experimental class 2 was higher than the control class (Fhitung = 6,7465 > F’ = 6,2). It can be concluded that there was MMP learning model based on GeoGebra effective in improving students’ mathematical problem solving ability.