The present invention relates to a fixing rod connecting device and, more specifically, to a fixing rod connecting device, comprising: a main body having a space into which one or more rods can be inserted； and a fixing screw fastened to the main body so as to fix the rod, wherein one side surface of the main body is formed to have a predetermined upward inclination angle relative to the other side surface thereof, thereby eliminating interference with other surgical instruments when the fixing screw is fastened, enabling an incision area of a patient to be minimized, and enabling three-dimensional alignment and fixation of the rod.
