Abstract: A piper cutter in the invention comprises a spindle, a fixing disk, a locating seat, a cutting member, a stop member, and two nuts. The locating seat can slide along the spindle to move the cutting member to a location at a level of a required length of a pipe body to be cut, whereby after a socket head of a power drive unit is locked on a fixed head of the spindle, the power drive unit is actuated to rotate the spindle with a lower portion of the spindle moved sideways to make the cutting member follow the rotation of the spindle to cut the pipe body accordingly, thus enabling the piper cutter to be convenient and quick in use; time-saving and labor-saving; adapted to cut pipe bodies with different thickness, bore sizes or length; and, provided with good working efficiency, economical benefits and high utility in industry.