Introduction: the present study aimed to examine the impact of cognitive-behavioral group social work interventions on social adjustment of delinquent children.

Method: in this experimental research (pre-test and post-test design with control group), 40 delinquent children were selected from Tehran rehabilitation of young offenders' center and randomly assigned into experimental and control groups. The study repeated for 12-14 and 15-18 years old children. The experimental groups participated in social work group for 9 sessions and the control groups received no intervention. To gathering information we used from Bell Adjustment Questionnaire and to analysis the data independent T test were used.

Findings: The findings indicated that the application of cognitive-behavioral group social work had significant effects on social adjustment of 15-18 years old children.

Discussion: So conduction of a group social work model to improve social adjustment of delinquents is possible. This model can be helpful in schools, rehabilitation centers or social work clinics in probation services.