The invention relates to a fixation assembly (20a, 20b, 20c, 20d) for vertebra of the spinal column with an implant (1) to be inserted into the vertebra body and with a pedicle rod (2). The implant (1) has a socket (3) for the mobility of the pedicle rod and the pedicle rod (2) is arranged within the socket (3) for a permanent mobility of the pedicle rod (2) with respect to the implant (1).