The aim of this study is to determine the relationship between perceived organizational ethical climate and counterproductive work behaviors (CWB). In this study, relational research method was used and the data were collected from 659 employees in a big public institution in Turkey. The relations among the variables were analyzed through correlation and multi linear regression. It was found that there is negative correlation between perceived organizational ethical climate and overall CWB, and organizational ethical climate has a significant effect on CWB. It is believed that, knowing what types of CWB in what types of organizational ethical climate exist more commonly. It is also believed to be very important not only for Turkish public administration but also for human resource management. The findings of the study may provide information for the managers in the organization, which the study carried out, by determining the level of tendency toward CWB and, the types and the levels perceived organization ethical climate.