Abstract: A pipe end cutting apparatus for processing pipes without variations in the angle of bevel and the root face thickness due to changes in the diameter of the pipes. There are provided a pipe clamping device for clamping the inside of a pipe, a rotary driving unit supported on the pipe clamping device, a feed unit for moving the rotary driving unit in the axial direction, and a control unit for controlling the rotary driving unit to rotate concentrically with the pipe. Processing tools for cutting the pipe end are mounted on the rotary driving unit through parallelogram links in such a manner that the processing tools are each caused to make a parallel movement in the radial direction of the pipe, while maintaining its cutting angle at a given angle with respect to the pipe end.