This research aims to investigate geometric thinking levels of candidate mathematics teachers of primary and secondary schools in terms of various variables. The participants of the study consist of candidate primary and secondary school mathematics teachers studying at Dicle University in spring semester of 2010 – 2011 academic year. In collection of data, the geometric thinking test developed by Usiskin (1982) was used. According to research findings, most of the candidate primary and secondary school mathematics teachers couldn’t reach the required geometric thinking level. There weren’t any meaningful difference between geometric thinking levels of candidate primary and secondary school mathematics teachers. Geometric thinking levels of candidate primary and secondary school mathematics teachers showed a significant difference in terms of class variable, while they didn’t differ significantly in terms of gender and type of graduated high school variables.