Se analiza la importancia de los informes psicologicos forenses en la toma de decisiones judiciales de primera instancia en delitos sexuales en la ciudad de Barranquilla, Colombia, mediante un enfoque cuantitativo de alcance descriptivo. Se analizaron diversas variables con el proposito de categorizar si en las sentencias judiciales se menciona la pericial por el Juez al momento de dictarlas, y cual es el valor diferencial de los informes psicologicos forense. Tambien se reviso la concordancia entre la decision final del Juez y los resultados plasmados en el informe psicologico. Como conclusion significativa se obtuvo que en el 80% de las sentencias hubo mencion a la pericial por el Juez al fundamentar su decision; en un 80% de los casos el Juez tomo la decision de manera concordante con los resultados del informe psicologico. Como conclusion, se plantea que para la Administracion de Justicia se requiere personal auxiliar especializado y que el psicologo juridico en funcion forense funge como fuente directa de conocimiento. Y se constituye como un medio de conviccion apreciable.It was analyzed the importance of forensic psychological reports on judicial decisions by first instance courts in sexual assaults in the city of Barranquilla, Colombia, this by using a quantitative descriptive methodology. Different variables were analyzed in order to know the mention of the forensic psychological evaluation and what is the differential value of the forensic psychological reports; as well it was reviewed the correlation between the final decision of the Judge and the results reflected in the forensic psychological report. As significant results, were identified that in 80 % the judge mention the psychological evaluation to substantiate the reasons of the sentence, also in 80 % the Judge made the sentence in a consistent manner with the results of the report. In conclusion, we propose that for Justice Administration it is imperative the support of specialized auxiliary personnel and legal psychologist serve as a direct source of knowledge, whose contribution is establish as a significant means of conviction.