A 59-year-old man with emesis and shortness of breath which appeared two weeks after initiation of daily intake of a turmeric supplement was admitted to a nearby hospital. Physical examination showed fever and hypoxemia and chest CT scan demonstrated ground glass opacities bilaterally in the lungs. After being hospitalized, he continued taking the turmeric supplement. Since his disease deteriorated, he was transferred to our hospital. Our investigation revealed elevation of serum KL-6 levels, a marked increase of lymphocytes in the bronchoalveolar lavage fluid, and histopathological features of transbronchial lung biopsy showing alveolitis with lymphocyte infiltration. After careful exclusion of other possible etiologies, we suspected that his disease was interstitial pneumonia attributable to turmeric. Cessation of the turmeric supplement and oral steroid therapy improved his symptoms and chest CT abnormality. The drug-induced stimulation test (DLST) for the turmeric supplement was subsequently positive. From the above clinical course and data, we diagnosed him with drug-induced lung injury caused by a turmeric supplement which has never been reported before.