Objectives: Most of the Alzheimer's patients are looked after at home by family members. Caregivers who are not prepared for looking after these patients are under pressure because of their increasing needs. Both patients and family members need social support provided by not only healthcare professionals but also family, friends and neighbors in order to cope with their physical, psychological, social and economical problems. This study was conducted in order to determine the relationship between care burden and perceived social support of family caregivers who look after an Alzheimer's patient.Methods: This study was cross-sectional and conducted at a neurology outpatient clinic of a university hospital. 107 family members who take care of an Alzheimer's patient was included. Personal information form, Barthel Index (BI), Lawton-Brody Index (LBI), Multidimensional Scale of Perceived Social Support (MSPSS), and Zarit Burden Interview (ZBI) were used to collect data.