Background: Pediatric cancer diagnosis and treatment can impact the psychological adjustment and quality of life (QOL) of caregivers. Objectives: We examined: (a) the relationship between caregiver QOL and family psychosocial risk, mental health symptoms and distress concurrently, shortly after diagnosis, and six months later; and (b) which of these factors at near diagnosis can predict caregiver QOL six months later, controlling for demographic and child clinical factors. Methods: Participants were 122 caregivers in two Canadian sites.