Psychology is the scientific study of the human mind and its functions, dealing with the study of emotions, personality, and cognitive processes that influence a person’s thinking, feeling, and acting. Understanding the psychological factors that lead someone to commit a crime, as there are many factors that differ from person to person. For example, some people commit crimes if they are facing a bad situation, while others try to get away from this situation. This paper discusses the psychological causes of crime by highlighting key factors such as mental disorders, childhood trauma, emotional instability, cognitive distortions, lack of empathy, low self-control, and aggression. These factors greatly influence judgment, behavior, and the perception of right or wrong. There are also some major psychological theories, such as psychoanalytic theory, behavioral theory, cognitive theory, and personality theory, to provide an overall explanation for criminal behavior, since these theories describe how the unconscious mind can conflict with the fulfilment of desires through criminal behavior and how people learn misbehaviors from others experiences, such as faulty thinking patterns leading to delinquency and certain personality traits.