Objective: The objective of the study is to assess the unmet needs of cancer caregivers and to identify the possible predictors of their supportive care needs in China. Methods: This multicenter, cross-sectional study enrolled 449 cancer patients' family caregivers' dyads. Patients provided general information and Karnofsky performance status (KPS); caregivers provided general information and completed a survey of Chinese version of the Supportive Care Needs Survey-Partners and Caregivers Scale.