Explaining the effect of geometric habits of mind on mathematics courses can affect how to realize the conceptual teaching. Within this scope the aim of the study is to determine the relationship between mathematics preservice teacher’s geometric habits of mind and mathematics achievement. Therefore, this study is carried out with 30 senior preservice teacher in a state university in Turkey. In this study, the relationship between preservice teacher’s geometric habits of mind achievements tests’ scores and mathematics courses’ scores are analyzed. As a result of the study, positive and statistically significant relationship is found between preservice teacher’s geometric habits of mind scores and some mathematics courses such that Geometry, Analytical Geometry 2 and Mathematical Software. It is mean that preservice teachers use geometric habits of mind while encountered problems.