A vertebral spacer is attached to the vertebral arch in a simple manner when performing laminoplasty. Provided is a vertebral spacer (1) including a columnar main-body portion (3) attached to individual cut end portions of the cut vertebral arch by screws, wherein the main-body portion (3) is provided with two accommodating holes (4) formed inside the main-body portion (3) at positions spaced in a longitudinal direction of the main-body portion (3), and individually accommodating head portions of the screws, the individual accommodating holes (4) are provided with openings (5a) through which the head portions are inserted into the accommodating holes (4) from outside the main-body portion (3), and the openings (5a) have diameters greater than diameters of shaft portions of the screws, smaller than diameters of the head portions, and increased to a size that is greater than the diameters of the head portions.
