Provided is a folding cervical vertebra protective band which not only has a sufficient cervical vertebra protective function, but also can be easily folded into a conveniently portable size. The folding cervical vertebra protective band includes: a belt-like protective band body which has a length and a width for surrounding substantially an entire of a cervical portion of a user; and an attachable/detachable fixing means for holding the protective band body when in use in a use state in which the protective band body is curved around the cervical portion, in which the protective band body has divided components obtained as a result of multiple divisions of the protective band body in a longitudinal direction thereof and has hinge portions for foldably coupling those multiple divided components to each other therebetween, and is attached to the cervical portion while the entire of the protective band body is curved around the cervical portion when in use, and is folded into a small size with use of the hinge portions except when in use.