Sex offenders, unlike many other criminals, are often psychologically disturbed and amenable to pychotherapy. However, problems presented by sex offenders encompass the whole range of criminal offenses as well as sexual difficulties. Many have nonsexual criminal records as well and display antisocial, aggressive, irresponsible behavior in all facets of life. These offenders must learn self-restraint and social responsibility rather than receive therapy in sexual matters. Other sexual offenders, however, are socially responsible but emotionally deficient and unable to attract a suitable partner. These persons require social skills training or erotic reorientation. Still others are erotically attached to violence, resort to sex deviance in times of stress, or have other psychiatric illnesses. Although therapeutic sessions and discussion groups in which participants vent feelings are time-honored treatment methods, the insights provoked do not always lead to changed behavior. Behavior modification techniques can also be effective. Since catering to all the needs of sex offenders is impossible in one facility, various groups such as police, social workers, and marriage counselors should be alert to the possibility of sex offenses and recommend treatment for the persons involved. Moreover, only the few, most serious offenders should be imprisoned, because therapy is difficult in prison. Most sex offenders should be compelled to attend therapy while on probation. In addition, lengthy followup should accompany treatment, and measure other than recidivism rates used to test the efficacy of various sex offense therapy. Thirteen references are included.