To provide a pipe cutter which can easily, quickly and efficiently cut pipes.

This pipe cutter is equipped with a cutting blade 3 for cutting a pipe P. A protruding tooth 30 for feeding the blade tip section 31 of the cutting blade 3 is arranged on a non-circular contour, and cutting is performed in such a manner that the incision amount into the pipe P of the blade tip section 31 for every cycle may gradually increase.