Abstract: A sliding spider (10) for supporting tubing (T) through a rig floor includes a fixed gate (60) and a movable body (30). The fixed gate (60) is fixedly positioned on a base assembly (20) and is positioned adjacent one side of the tubing (T). The fixed gate (60) has a pair of locking ribs (66) for engaging the movable body (30) and has a roller (68) mounted atop the gate (60) for guiding a line (L) past the gate (60). The movable body (30) is positioned on the base assembly (20) adjacent another side of the tubing (T). The movable body (30) defines an open throat (32) for the tubing (T) and has first and second body portions (41a-b) connected together by a hinge pin (44). The movable body (30) slides on the base assembly (20) to an advanced position over an opening (24) in the base assembly (20) such that the tubing (T) is positioned through the open throat (32) of the body (30).