Personality disorders are permanent patterns of inner experience and behavior that are manifested in the adaptation problems of a person towards himself/herself and also towards his/her environment. Personality disorders are pervasive and inflexible patterns, they have an onset in adolescence or early adulthood and appear to be stable over time. People with personality disorders have a significantly impaired quality of life as the disorder causes problems in their social environment, work, and other important areas of functioning, and it also manifests itself in cognitive, emotional, and interpersonal patterns that deviate significantly from cultural expectations. In addition to the notion of personality disorder, the notion of psychopathy is often used in the psychiatric literature as it is often equated with the notion of a criminal. Therefore, some authors call psychopathy one of the fundamental conative traits (personality traits) of delinquents and the most important psychological construct in Criminological science. Personality disorders are divided into three clusters. Cluster A consists of withdrawal-prone disorders, cluster B consists of disorders prone to risky and irresponsible behavior, and cluster C consists of anxiety and avoidance-prone disorders. The available studies state that personality disorders from cluster B are the most prevalent among perpetrators of criminal offenses who are diagnosed with personality disorders. In this regard, this paper aims to unite previous knowledge in the field of the Criminological significance of personality disorders by reviewing the available literature.