Canadian foster homes for adults with serious mental illness are operated by non-professional caregivers, usually women, whose mandate is to support residents and reintegrate them into the community. While mental health professionals recognize that adult foster homes are an important service for this population, there is little understanding of how caregivers impact on the lives of their residents.This article draws on the findings of a larger study which examined both caregiver and resident perspectives on the helping relationship in adult foster homes. Caregiver perspectives on the values and qualities required to help people living in foster homes are reported.With no pre-set theoretical framework, this qualitative study employed an inductive approach within a naturalistic paradigm. Semi-structured interviews were conducted with 20 caregivers. Data analysis was an ongoing, 2-year process, involving the identification of categories and themes through several distinct stages.The study included Montreal adult foster homes (n=242) for persons with serious mental illness, supervised by two university-affiliated psychiatric hospitals.Twenty caregivers, selected according to years of experience and number of residents in the home, were diverse in terms of age, cultural background, family composition, education and occupational background.Caregivers possess a clearly articulated value system, and 21 specific qualities which reflect the attributes of both professional and informal helpers. These values and qualities provide caregivers with a “professional” or “vocational” orientation.A deeply held system of values and qualities is critically important to caregiver effectiveness and job satisfaction. Findings suggest that caregivers are highly motivated, and should be recognized as full participants in the mental health system at both policy and practice levels.