The invention traction for abdominal surgery to help in the surgical traction device for that given with open abdominal muscle the incision during open surgery to secure the surgical space, can be moved smoothly a longitudinal retractor to pull the abdominal muscles in the longitudinal direction by a small force It relates to an apparatus. The present invention is moved to the method moves on a transfer rail fixed to one end of the fixed lever a lever on the left and the right transfer be combined traction device, fitted to the rail transport groove in which transferor group, the transfer across the transfer rail species is sandwiched groups with a hook which bends the tip fitting square transfer rail and a transfer fixing the axis and the fastener is extrapolated and fixture presses on the rotation axis and a shaft fixing member is interpolated rectangular transfer rail that the handle is inserted into the teeth are formed, the fastener top and is accomplished by comprising a stop bearing sandwiched between the bearing groove and placed in the fixture and spring, the shaft fastener is Tangier between the handle.