Child sexual abuse is a phenomenon of extreme complexity, considered one of the most serious forms of human rights violation. Therapeutic and judicial interventions are required. When it occurs within the family, in addition to measures that stop the violence and hold the aggressor accountable, the treatment of the child and the family is essential. The present study investigated the practices in psychological assessment carried out by forensic psychologists of the Rio de Janeiro judiciary in judicial proceedings involving suspected intrafamilial child sexual abuse. For that, 6 forensic psychologists linked to the Court of Justice of the State of Rio de Janeiro were interviewed. Among the participants are four judicial analysts occupying positions of psychologists and two psychologists who are judicial experts. From Bardin s content analysis, three categories emerged: psychological assessment: perceptions and resources; psychological expertise in cases of intrafamilial child sexual abuse and difficulties faced by forensic psychologists in the context of the Court of Justice. We concluded that the evaluative practices are diverse and there is little opening for the use of psychological instruments besides the interviews. The temporal spacing between the occurrence of violence and the expertise, the high volume of work and the short procedural deadlines were complicating factors mentioned by all participants. We evidenced that the limitations inherent to the forensic context interfere in the systematization of the evaluation process and in the choice of procedures to be used in the judicial expertise. We emphasize the importance of further studies on the difficulties faced by psychologists in the forensic field due to the particularities of each Brazilian state.