To cut a film accurately without generating a bending between the grid rollers of a cutting plotter and a cutter, when a thin film is cut.

When the direction to deliver a film 43 by grid rollers 41a and 41b is made as the regular direction, a figure is cut in the regular direction by a cutter by delivering the film 43 in the reverse direction at the end of the film 43. As a result, a figure B at the right side of the film 43 is cut clockwase, while a figure A at the left side is cut counterclockwase, in this cutting method.