Recent research indicates that, of the various forms of treatment available to sexual offenders, cognitive-behavioural methods are likely to have the greatest impact in reducing rates of sexual re-offending. Cognitive-behavioural treatment typically targets attitudes that support sexual offending, anger management, victim empathy, deviant sexual arousal, and relapse prevention. More recently, treatment has targeted cognitive processes more generally, management of other emotional states in addition to anger, intimacy deficits, and risk self-management (Marshall, Anderson, & Fernandez, 1999; Yates, Goguen, Nicholaichuk, Williams, & Long, 2000). This article describes the components of cognitive-behavioural treatment with sexual offenders, including recent developments, assessment, treatment methods, and the importance of therapist characteristics on the therapeutic process and on treatment outcome.