Objective: To evaluate the efficacy of a specific, replicable group treatment program to improve social communication skills. Hypotheses: Social communication skills training, in a group setting, will improve individual pragmatic communication deficits for individuals with TBI; and with improved social communication skills, overall social integration and life satisfaction will be improved and maintained at 6 months posttreatment. Participants: Fifty-two community-dwelling individuals with TBI who had received rehabilitation and were at least 1 year postinjury: 44 male/8 female, mean age 42 years, mean time postinjury 9 years; 46 significant others (SO). Methods: Randomized treatment/deferred treatment control group design. Outcome measures included goal achievement (GAS), Social Communication Skills Questionnaire-Adapted (SCSQ-A), the Profile of Functional Impairment in Communication (PFIC), the Occupational, Social Integration, and Productivity measures from the CHART and the CIQ and Satisfaction with Life Scale (SWLS). Results: The treatment group showed significant improvement compared to the controls on SCSQ-A (P <= .005) and on 7 of 10 subscales of the PFIC (P <= .05 to <.001). Both groups posttreatment showed significant improvement on GAS (P <= .001); and SWLS at 6-month posttreatment follow-up (P <= .01). SOs and clinicians rated participants as significantly improved posttreatment and on follow-up on GAS. There were no significant findings relative to changes on the CHART or CIQ posttreatment or 6-month posttreatment follow-up. Conclusions: Social communication skills training, in-group setting, improved specific individual communication deficits for individuals with TBI from the participant, SO and clinician perspective. These gains were maintained on follow-up. Overall life satisfaction for participants improved.