This study analyzes the dimensions and consequences of the burden of caregivers of patients with SMD (Severe Mental Disorder) and the repercussions that this role has on their quality of life and health in the physical, psychic and social spheres. This is a descriptive cross-sectional study and inferential observational study which explores caregivers of patients with SMD admitted to Psychiatry Day Hospital (Huesca, Spain). The technique of consecutive cases was used as a technique for sampling and sample selection. An individualized interview was arranged, where sociodemographic data were collected and scales and instruments were administered. 52 caregivers met the inclusion criteria. The female sex predominates (67%), being the patient's mother (48%). The average age of caregivers is 60 years old. Almost 60% of the sample presents intense burden and alterations of general mental health, 77% reveal anxiety and depression, and 46% little social support.Burden is associated with hospitalization within the last year, anxiety, or total social support received. It is appreciated how the diagnosis of a chronic disease constitutes an important challenge for the patient and their family, dueThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.