The current experiment has been designed for determining the individual and group cognitive therapy training on enhancing the self-esteem and reducing and the tendency towards using narcotics of those who addicted to it. The experiment population included 400 individuals dependent on narcotics according to the TR-IV-DSM diagnosis criteria in Gilan province, in which 36 individuals were selected with random sampling and were replaced in two training groups and one control group. The present research is an experimental one and is designed in pre test __ampersandsignndash; post test experiment with control group. Research tool includes Kuper Smith (1967) self __ampersandsignndash;esteem questionnaire, and Pegrod__ampersandsignlsquo;s (2004) narcotics using tendency test. The research hypothesis were examined using covariance analysis and the results obtained showed that: - The individual and group cognition therapy effectiveness on enhancing self-esteem and reducing the tendency towards using narcotics is different in those who addicted to narcotics. Individual cognitive therapy has no effect on increasing self-esteem in opioiddependent individuals. Group cognitive therapy is effective in increasing the self-esteem in opioid-dependent individuals. - Individual cognition therapy is not effective in reducing the tendency towards narcotics in opioid-dependent individuals. Group cognition therapy is effective in reducing the tendency towards narcotics in opioid-dependent individuals.