PURPOSE: To provide a pipe bender by which the pipe can be precisely bent and the removal of the pipe is easy after bending it.

CONSTITUTION: A main barrel 3 with a circular arc part fitting with the curvature of the bending part of a pipe 4, is rotatably as one body and attachably and detachably provided on a rotary shaft 2 rotating by a driving device. Pipe pressing fittings 5 rotating as one body, putting the main barrel and the pipe between them, which are opposingly arranged on the front side in the rotating direction of the main barrel, are attachably and detachably provided. A pulley- shaped auxiliary barrel 6 is rotatably, attachably, detachably and opposingly arranged on a supporting shaft 7 on the rear side in the rotary direction of the main barrel. On the contact surfaces of the main barrel, the pipe pressing fittings and the auxiliary barrel, recessed grooves 3d, 5b and 6b with circular-arc shaped sections, coming into contact with 1/2 of the outer peripheral surface of the pipe to be bent, are formed. Bending with satisfactory accuracy is attached by changing the barrel and the pressing fitting according to a bend angle and the diameter of the pipe to be bent.