Pulmonary fibrosis causes irreversible damage to the lungs by excessive build-up of extracellular matrix. It disrupts the normal pulmonary structure, affecting its contraction and expansion ability, thus interrupting its normal functioning. This damage gradually progresses, causing severe breathing problems. The current treatment lacks the damage repair capacity and only slows the progression, urging for an alternative therapy. Stem cell treatment for pulmonary fibrosis repair the damage by differentiating into lung cells and maintaining tissue elasticity. It also prevents further tissue deterioration by reducing inflammation, oxidative stress, and cell death.