Introduction: Eating disorders under 5 years old may cause development and grow problems. Disorders in family functionality can be associated. Objective: To describe non-organic eating disorders in children under 5 years of age and their association with family functionality in a second-level hospital in Puebla. Methods: It was a descriptive, cross-sectional study. Children under 5 years old with non-organic eating disorders were included. A questionnaire to study eating disorders (IMFED) and other one to describe family functionality (FACES III) were applied to their parents who previously signed informed consent. Descriptive statistics and Spearman test were used. Results: 105 patients were evaluated, 57 men and 48 women, medium age 3.042, minimum 2, maximum 60, ± 16.68 months old. Children 12-23 months old were more frequent. Parents reported chaoti...