Pediatric obsessive-compulsive disorder (OCD) is a chronic and often disabling illness with an estimated lifetime prevalence of 1 to 3%. Pediatric OCD is associated with significant social, educational, and familial impairment, as well as comorbid emotional and behavioral disturbances that serve to complicate the prognosis of the illness and treatment outcome. While limited open treatment trials and one controlled trial have demonstrated cognitive-behavioral therapy (CBT) to be effective for pediatric OCD, controlled trials are lacking in the literature. There are a number of incremental benefits that an intensive program for OCD may offer. First, existing outpatient interventions typically achieve treatment gains over a 15 to 20 week period. The present program typically lasts between 2 to 4 weeks, and thus may present as a more timely, cost-effective, and efficient means of treatment for some individuals. Second, given that many children and adolescents may not have access to mental health professionals who are trained in empirically grounded interventions for OCD, the present treatment setting allows youth to receive appropriate, state of the art care. Finally, evidence suggests that daily CBT may be particularly effective in treating children who have been refractory to prior treatments (e.g., medication or once per week CBT). Prior to treatment, all consenting families will be randomly assigned to either the treatment condition or a three-week wait-list control condition. Those families randomized to the wait-list condition will receive treatment immediately after the three weeks are completed. The treatment group will be administered all measures immediately before treatment, immediately after treatment, and three months after treatment. The wait-list control condition will be administered all measures upon starting the wait-list period, immediately following the conclusion of the three-week wait-list period, and after the treatment program has finished. The purpose of the current study is to evaluate the efficacy of daily cognitive-behavioral treatment for pediatric OCD.