Aim: The present study examined the association between depression of persons with dementia and family caregiver burden, as well as whether the association depended on the level of caregivers' ability to find positives in caregiving.; Methods: Based on the medical records of a local mental health hospital and the statistics of an epidemiological survey, this cross-sectional study included 157 major family caregivers of non-institutionalized dementia patients in the rural sector of Western China's Sichuan Province. They responded to the Cornell Scale for Depression in Dementia, a short version of the Zarit Burden Interview, a subscale of a caregiver meaning scale and demographic questions.; Results: Controlling for the demographic variables of the caregivers, the present study found that dementia patients' depression level was significantly associated with caregiver burden (P < 0.001), and the caregivers' levels of finding positives in caregiving significantly moderated the association (P < 0.05). Furthermore, the positive correlation between dementia patients' depression and caregiver burden was weaker among the family caregivers with a high level of finding positives in caregiving, compared with those with a low level of finding positives in caregiving.; Conclusions: This research suggests the importance of facilitating family caregivers of dementia patients to find positives in caregiving. It provides initial data for the development of dementia caregiver burden interventions that are based on the understanding of the deep meaning of dementia caregiving.