The present invention provides an instrument for preventing and treating hemorrhoids, which enables easy attachment to the body, ensures comfort in use, and effectively prevents and treats hemorrhoids.An instrument for preventing or treating hemorrhoids according to the present invention is adhered to a patients back in contact with the sacrum and/or the skin in its periphery either directly to the skin or indirectly through clothing, the instrument including: a container having air permeability, and a heat generating material that generates heat by oxidation upon contact with air and is contained in the container.
