Tourette Syndrome (TS) is a disorder characterized by motor and vocal tics. The most studied and promising intervention is Habit Reversal Training (HRT) and its variations: Behavioral Comprehensive Intervention for Tics (CBIT). Group intervention for children with TS has not been evaluated. The aim of this study is to assess the efficacy of CBIT group intervention compared with Psycho-Educational-Supportive group in terms of tic severity.