Introduction: Tuberculosis represents one of the chronic diseases, considered a global public health problem due to its mortality rates. Many types of research works mention the different factors that trigger the spread of the virus to the host, which stand out, economic level, inadequate knowledge of the treatment, motivation by the family, leading to the subsequent abandonment of the bacterial resistance of the drug treatment. Objective: The objective of this research work is to determine the family functionality in people affected by tuberculosis in Health facilities. Method: This is non-experimental, descriptive research with a quantitative approach, in which a selective, non-probabilistic and transversal associative strategy was used; evaluating 192 families that have relatives with Tuberculosis, between 18 and 65 years old. The collection data technique is the survey and the instrument used Family Adaptability and Cohesion Evaluation Scales (FACES IV) by Olson to assess family composition. Results: As a result, the leading role played by the family in patients diagnosed with Tuberculosis was obtained, reflecting a high percentage, in the Cohesion dimension, it shows the highest score with 99 (52%) being very connected, in the Flexibility dimen sion with the highest score with 136 (71%) being the High level, in the Communication dimension High Level with 95 (49%) and in the Family Satisfaction dimension where the Low level predominated with 67 (35%). Conclusion: We concluded that preventive, and promotional measures should be included in the first level of medical care to provide psychological support to relatives and patients diagnosed with tuberculosis.