Provided is a medical ultraviolet light irradiation device capable of correctly radiating ultraviolet light to an afflicted part that is visually confirmed by the user. The medical ultraviolet light irradiation device 100 according to the present invention is provided with an ultraviolet light source 1 that emits ultraviolet light and a holding body 200 that holds the ultraviolet light source 1. The holding body 200 is formed in an arch shape and is provided with a moving unit for which the distance and positional relation thereof to an object can be adjusted an image-capturing means for capturing an image of the object. A region to which ultraviolet light is to be emitted is designated on the image that is captured by the image-capturing means 150.
