The present invention is provided in the spare blade interior for cutting the pipe, as well as to cut a pipe of a semiconductor line by using a blade, it is possible to open and close the inside by the handles to close the blade in the pipe, the selected pipe It relates to a pipe cutter having a guide line for a semiconductor that can navigate. Feature of the invention, the cutter body (10) for penetrating at one end to the other end, the lifting shaft 20 is elevated in the state inserted into the inner side of the cutter body 10, and can idle on the top of the vertical shaft 20 to the pipe (1), the blade 30 for cutting, a blade 30 correspond be the support roller 40 and the blade 30, which is supported on one side of the pipe 1 to a pipe provided with (1) of the lift operating member 50 and the lifting operation member 50, the cutter body to the to the bottom is kept idling possible state to the through state (10) for elevating the elevating shaft 20, the other to come into close contact, or spaced to the side rotation of the fixing member 60 which is detachably fixed to the lower portion, to be fixed to the lower end of the fixing member lifting the operating member penetrated through the 60, 50, forward rotation of lifting the operating member (50) or the reverse rotation knob ( 70) and, fitted on the pipe 1 in the state of having on one side of the cutter body 10 is moved along the pipe (1), comprises a locking or unlocking guide portion 100 for the rotation knob 70 do.