Abstract: Provided is a pipe fitting and clamping apparatus including a fixed block having a first sliding surface with a groove shape formed therein, a pair of pivot blocks pivoted about hinge pins installed at both of left and right ends of the fixed block and having second sliding surfaces rounded at inner sides thereof, a pair of first insert guides installed inside the fixed block and having rear surfaces which come in close contact with the first sliding surface and slide, a pair of second insert guides installed inside the pivot blocks and rounded such that rear surfaces come in contact with the second sliding surface and slide, and a plurality of inserts having front surfaces in contact with outer circumferential surfaces of pipes and rear surface which come in close contact with the front surfaces of the first insert guide and the second insert guide and slide.