The diagnosis of psychological problems often requires psychologists to consult the relevant literature to identify through the symptoms presented by their patients a specific treatment. This paper presents a study of an application of Case-Based Reasoning (CBR) to the Psychology field. It aims to apply a CBR tool in order to help psychologists to create a case database that can help them to find some cases related to a specific patient problem and adapt the similar cases retrieved by the system to a particular treatment for a given patient. The results show that the CBR tool proposed here is very useful for searching the most similar cases, offering psychologists a good support to find a similar treatment for a specific case.Sociedad Argentina de Informática e Investigación Operativa