Obsessive-Compulsive Disorder (OCD) is a common, chronic, and long-lasting disorder in which a person has uncontrollable, reoccurring thoughts (obsessions) and/or behaviors (compulsions) that he or she feels the urge to repeat over and over. A speech graph is a tool in which the speech is represented as a network with nodes connected by edges: nodes correspond to words and edges correspond to semantic and grammatical relationships. With this tool, various speech attributes can be quantified and analyzed. Several studies have been published in the last decade using speech graphs analysis in psychosis, showing that it might be a useful complementary tool in the diagnosis of psychotic disorders. In our research, we aim to investigate if speech graphs can also be a useful complementar tool in the diagnosis of OCD.