The invention relates to an implant for use between the vertebrae (8) of the spine as a placeholder for vertebrae or vertebrae parts removed from the spine, having a first implant part (2) and a second implant part (3), which can be adjusted against each other in the direction of the coaxial longitudinal axis thereof for changing the length of the implant (1), and having at least one mounting bracket (10) that can be attached to one of the implant parts (2 and 3), and which faces the adjacent vertebra, and partially overlaps the same. The mounting bracket (10) is formed by a vertebra attachment plate (11) and by a base plate (12) comprising a guide rail (13), protruding from the vertebra attachment plate, and serving for the radial adjustment of the mounting bracket (11) as opposed to the one implant part (2 and 3), is wherein a means is associated with the one implant part (2 and 3) for the radial fixation of the base plate (12).