A pelvis fixing device with a screw for the latter is provided. The screw comprises a screw element with a threaded shank and a head. Also provided is a holder which receives the head and which comprises a lower portion facing towards the shank side and an upper portion facing away from the shank side. The two portions encompass a rod. Also provided is a screw element for connecting the two portions and simultaneously fixing the rod. The pelvis fixing device comprises at least two such screws and at least one rod connecting them.