The present invention relates to a C-arm head cover. The C-arm head cover according to the present invention comprises: a fixed unit which includes a fixing means, and is capable of being fixed to a predetermined object; a first cover which extends from the fixed unit, and has a foldable structure; and a second cover which extends from the first cover, and is bent downward, wherein when the C-arm head rotates 180 degrees from an upright position around a C-arm table for supporting a person to be processed with radiography, the foldable structure of the first cover is unfolded, and then only the first cover or both the first cover and the second cover covers the C-arm head.