[ABSTRACT] Since the seventies, the concept of Social Support (SS) has produced an impressive literature and nowadays is considered an important factor that affects health and well-being. Several index of SS were included in the setting of the Galicia Study of Mental Health of the Elderly. Galicia, in the northwestern Spanish corner, is a region with 2,7 million of inhabitants (18% older than 65 years) where Health and Social Services belong to the same Ministry. Aim: To analyze the magnitude an