Chinese family caregivers of dementia patients suffer considerable grief in their caregiving activity; little research has been conducted on dementia caregivers' grief in China. This study aims to (a) confirm the factor structure of the Mandarin version of the Marwit-Meuser Caregiver Grief Inventory-Short Form (MM-CGI-SF), (b) evaluate the levels of family caregivers' grief, and (c) explore the best predictors of family caregivers' grief. A cross-sectional study was conducted to collect data from 91 caregivers of dementia patients. The Mandarin version of the MM-CGI-SF had a three-factor structure. Family caregivers' grief was at an average level. Family caregivers' monthly household income and caring time per day predicted their own grief. The Mandarin version of the MM-CGI-SF possessed the same factor structure as the original English version, and the Chinese family caregivers experienced an average grief which was predicted by the monthly household income and caring time per day of the caregivers.