Nowadays, Legal Psychology is, admittedly, on the rise! Nevertheless, bibliographical material on the subject is still very scarce and the knowledge produced in the area is not enought spread of. The professionals’ practice is constantly questioned and harshly criticized, often without a legal field’s knowledge and without deep reflections and debates about the facts that justify the professional`s action. Justice of Childhood and Youth has several issues in which the psychologist is called to act. In this study, the children and teenagers’ right of family life was the theme that was chosen to guide the discussions. It is known that there are thousands of children in our state that are deprivated of family life. These children, in the majority not orphans, are housed in institutions, many of them for over than two years, with no phone calls or visits from family. Many times, nothing is being done so that the child or teenager has that right complied, whether by reinstating the family of origin, either by placing in a foster family. This work aims to raise some reflections on the role of Legal Psychologist, revealing its multiple and complex facets, and rising considerations about the requirements and care for professional performance.