The aim of the current paper is to identify dimensions of the Static-99R, the most commonly used sex-offender actuarial scale. Exploratory factor analysis extracted three dimensions from the scale : sexual criminality, general criminality and young age. An interpretation of the psychological meaning of these dimensions was suggested : sexual criminality as an indicator of either sexual deviance or sexual preoccupations, and general criminality as an indicator of antisocial traits and/or psychopathy.