Objectives: We aimed to identify the predictive factors for the perceived family social support among cancer patients and caregiver burden of their family caregivers. Methods: Participants were 302 cancer patients and their family caregivers. Family social support scale was used for cancer patients, burden interview was used for family caregivers.All subjects also completed Beck depression invantery. The related socio-demographical factors with perceived social support (PSS) and caregiver burden were evaluated by correlation analysis.