The history of forensic psychology in Czech Republic and Slovakia is described in many psychological or criminological publications usually in the introductory chapters. These texts, however, differ in different aspects: definition of the beginning of forensic psychology and the description of the historical development of forensic psychology. The aim of this article is to present how forensic psychology’s history till the beginning of WWII is represented in Czech and Slovak psychological literature, and further to fill in missing information by searching for primary sources.