Periodontal diseases, one of which is chronic catarrhal gingivitis (CCG), represent a medicosocial problem. Standard therapy often fails to bring about stable results. Addition of low-energy laser exposure at wavelengths of 0.63 micron and 0.85-0.89 micron to therapeutic complexes helps attain stable results, which is confirmed by clinical, functional, immunological, and x-ray data and densitometry. Laser therapy exerts a multifactorial pathogenetic effect, eliminating inflammation in periodontal tissue, normalizing microcirculation in the periodontium, improving mineral saturation of osseous tissue of the alveolar processes of the jaws, and improving local immunity of the oral cavity. All this accelerates treatment and decreases the probability of relapses.