Conduct disorder is a severe condition characterized by hostile and sometimes physically violent behaviour and a disregard for others. Children with conduct disorder have a difficult time following rules and behaving in a socially acceptable way. Their behaviour can be hostile and sometimes physically violent, exhibit cruelty, children with CD starts from hitting and biting to, later, more than normal teasing and bullying, hurting animals, picking fights, theft, vandalism, and arson. Since childhood and adolescent conduct disorder often develops into the adult antisocial personality disorder, it should be addressed with treatment as early as possible; the earlier treatment starts, the better the outlook.