To improve detection efficiency and detection accuracy of a damage part of an inspection portion by a photographing device by irradiating the inspection portion with blue light.

This tire regeneration device R is equipped with a damage detection device 20 for detecting the damage part on a processed surface 2 formed by applying buffing to a base tire 1 formed from a used tire, and a skiving device 50 for applying skiving to the damage part. The damage detection device 20 is constituted of an illumination device 21 for irradiating the inspection portion 2a on the black processed surface 2 with blue light, a camera 22 for photographing the inspection portion 2a, and an image processing device 23 for determining the existence of the damaged part based on image data from the camera 22.