COMPOSITION COMPRISING OSMUNDACETONE OR PHARMACEUTICALLY ACCEPTABLE SALT THEREOF FOR PREVENTING OR TREATING BONE DISEASE

The present invention relates to a composition comprising osmundacetone or a pharmaceutically acceptable salt thereof for preventing or treating bone diseases. More specifically, the present invention relates to: a composition comprising osmundacetone, a pharmaceutically acceptable salt thereof, or an Osmunda japonica extract as an effective ingredient, for preventing or treating osteoporosis, rheumatoid arthritis, arthralgia, Paget disease, bone metastatic cancer, or fracture; a food composition for improvement; a use of a salt; and a treatment method. The composition according to the present invention shows a strong inhibitory activity against proliferation and differentiation of osteoclast which causes bone loss, and activation of differentiation of osteoblast, and thus can be usefully utilized in developing medicines for safe and effective treatment of bone diseases or functional foods for improving symptoms of bone diseases