This pilot study examined the effects of bright light therapy (BLT) on children with circadian rhythm sleep-wake disorder associated with school refusal. Study participants were 12 children (age : 13-15 years). They were randomly divided into two groups based on the therapy they underwent for 3 weeks : inpatient therapy alone (IT) and IT plus BLT (plus BLT) groups. Two participants dropped out of the study. The wake-up time regressed/relapsed 2 weeks after discharge in the IT group (5 patients) but was maintained in the plus BLT group (5 patients). Moreover, the plus BLT group showed significantly lower insomnia severity questionnaire scores. These results suggest that BLT is effective for children.