Abstract: A tubing clamp for firmly retaining flexible tubing without occluding flow through it and for forcing the tube into straight and open configuration. The tubing clamp rests on a platform member and comprises a pair of jaws positioned in opposed relation to each other and pivotally mounted on the platform member to be pivotally movable between open and closed positions. Facing surfaces of the jaws defines recesses that together define a tube port in the closed position of substantially the outer diameter of the tubing intended for retention therein. The tube has a parting line, and the jaws also define overlapping members at the parting line to prevent pinching of tubing occupying the tube port in the parting line as the jaws are moved to closed position.