This study investigate the inter-correlations between the Psychopathy Checklist-Revised (PCL-R; Hare, 2003), the Comprehensive Assessment of Psychopathic Personality - Institutional Rating Scale (CAPP-IRS; Cooke, Hart, & Logan, 2004) and the Interpersonal Measure of Psychopathy (IM-P ;Kosson, Steuerwald, Forth &Kirkhart, 1997). These three scales were applied to seventy adult male inpatients from a forensic hospital in Belgium. The analyses reported significant correlations between several domains of the CAPP-IRS (e.g. Attachment, Dominance and Self) and the interpersonal facet of the PCL-R. Concerning the IM-P, the factors Grandiosity and Boundary violation are highly correlated with the interpersonal facet of the PCL-R.