To remove residual resin efficiently by sliding a cutter held at a cutter holding part movable along a guide rail secured to a table along the guide rail.

A guide rail 2 is secured to a table 1, a cutter holding part up/down mechanism 3 is coupled with the guide rail 2 and a cutter holding part 4 is fixed to the cutter holding part up/down mechanism 3. A slit 41 is made in the cutter holding part 4 and inserted with a cutter 5 such that the cutter 5 abuts, on the side opposite to the forward end side, against the rear side of the slit 41 to be positioned in place. The slit 41 is made in the cutter holding part 4 such that the edge side is in parallel with the table face and the cutter 5 makes an acute angle with respect to the table face. The cutter 5 is slid along the guide rail 2.