Abstract: Disclosed are a pharmaceutical composition for preventing or treating a respiratory disease, and health functional food, a food composition, and a quasi-drug composition for preventing and ameliorating a respiratory disease, each including, as active ingredients, a Lactobacillus plantarum KC3 strain and a Leonurus japonicus extract. The composition including the Lactobacillus plantarum KC3 strain (Accession No: KCTC13375BP) and the Leonurus japonicus extract as active ingredients according to an aspect has a defense effect against respiratory damage caused by air pollutants such as fine dust and can inhibit expression of IL-17A, TNF-?, and CXCL-1, thereby being able to effectively treat or prevent a respiratory disease including chronic obstructive pulmonary disease (COPD).