Relevance. Malocclusion often cause morphofunctional and aesthetic disturbances in the dentoalveolar system, and the lack of nasal breathing in children exacerbates existing deviations.Purpose. To assess morphofunctional parameters and quality of life indicators in children with impaired nasal breathing.Materials and methods. Photometric facial analysis, cephalometric and anthropometric calculations, anterior active rhinomanometry, and an oral health-related quality of life questionnaire for children (OHRQoL) were conducted.Results. In patients with impaired nasal breathing, social and family well-being parameters were reduced in the quality of life assessment.Conclusion. An orthodontist can determine the causes and degree of nasal breathing impairment by analyzing teleradiographs, orthopantomograms, and studying the quality of life in children. This aids in interdisciplinary planning for early diagnosis and treatment of children with maxillary constriction.