To provide a spine immobilization tool that can control the movement of the spine with improved safety as a spine immobilization tool 50 that includes a first covering portion 20, a second covering portion 30, and a joint portion 40. The first covering portion 20 covers at least a part of a vertebral arch 12a of a vertebra 10a at a head-side among the adjacent vertebrae, and thus can be fixed to the vertebra 10a. The second covering portion 30 covers at least a part of a vertebral arch 12b of a vertebra 10b at a buttock side among the adjacent vertebrae, and thus can be fixed to the vertebra 10b. The joint portion 40 couples the first covering portion 20 and the second covering portion 30 together while allowing changing relative positions of the first covering portion 20 and the second covering portion 30.
