To provide a pipe cutter capable of simply chamferring with high accuracy by anyone without the need of adjusting the cutting depth of a cutting blade for every pipe different in diameter.

Five support parts 6a-6e for rotatably supporting the end of a cutting support roller are formed on a side frame 6 so that the array state is substantially like a V-shape, and the central axis of the support roller is formed in a positioning place so that the respective lower end positions of the pipes different in diameter placed on the support roller are positioned in a different specified position depending on each pipe.