Abstract: The inventive apparatus for transosseous osteosynthesis comprises a detachable repositioning mechanism for axial compression and distraction of bone fragments, the mechanism having a thrust element with two guiding bars. A mobile traverse is mounted on the guiding bars. A lead screw which interacts with a screw orifice of the mobile traverse is fixed in the thrust element. Two side bars for movement of bracing frames, one end of each of the side bars being fixed to the mobile traverse, the other end being fixed to a holder with the aid of a screw clamp. The apparatus has at least two holders, each comprising a hollow body with an inner cylindrical surface, the axis of the body coincides with the axis of a corresponding tightening bolt, and also has a stem on the side surface of the body with an opening, which stem has a threaded portion. A latch is disposed in the holder body and is intended for fixing the holder in the direction of axial movement along the tightening bolt.