Problem solving is an integral part of learning mathematics and geometry is one of the basic materials of mathematics. However, the reality showed that students’ geometric problem solving abilities are still low. One of the causative factors is the students’ spatial ability. This is because there is a significant correlation between spatial ability and problem solving. Thus, spatial training needs to be implemented in schools as an effort to improve students’ geometric problem solving abilities. In addition, the purpose of this study is to determine the improvement of students’ geometric problem solving skills through spatial training. While, the research method used is a quantitative method with a one group pretest-posttest design. In this case, the selection of only one class is due to the limitations of researchers in conducting research during the pandemic. The research sample was students of class VIII-b SMPN 2 Sigli, totaling 30 students. Then, the research instrument is a test question about the ability to solve geometric problems. Data from students’ geometry problem solving ability were analyzed using Paired t Test and normalized N-gain. The results indicated that there was an increase in student’ geometric problem solving ability through spatial training. Based on this, it can be assumed that spatial training can improve students’ geometry problem solving ability. Hence, the implication of this research is expected spatial training can be done continuously to get better results.