Objective: To characterize the functionality of population "Fundación Hogar Geriátrico Luz de Esperanza"-FUNDELUZ" taking as conceptual reference the ICF. Methodology: We performed a cross-sectional study in 56 FUNDELUZ users. The data collection was performed by 12 students of sixth semester of physiotherapy, previously trained, between August and October, 2008. The assessed variables were: gender, age, main pathology and aspects of the CIF, as follows: Body functions, Body Structures, Activities and Participation and Environmental factors. Results: The sample was mainly conformed by males (57.1%), 82% between 55 and 94 years old and the most frequent pathology was the arterial hypertension (29.6%). In bodily functions, the most committed were those related to mobility (38.7%) and strength (34.7%). Regarding to body structures, the pelvic region and lower limbs were the most affected, both with 34.8%. In activities and participation there was more commitment in fine hand use (66.8%). The main environmental facilitator applied to the products and technologies for mobility (81.8%) and the main environmental barrier was the physical infrastructure of the institution (50.9%). Conclusions: The function most affected was mobility, which can be explained by the greater involvement of the pelvis and lower limbs, according with the detected. This problem is overcome with the use of the main facilitators found, but its use is hampered by the physical infrastructure of the institution, which constitutes the main barrier detected by the population.