To solve a problem that a disassembling operation of a conventional cutter takes a lot of trouble since an operator needs to rotate an oil element of a conventional separating cutter by means of a wrench.

This cutter comprises at least one pair of rollers; a base shaft part capable of adjusting a position towards the oil element; and a rotary lever rotatably installed and interlocked with the base shaft part with a central axis of the base shaft part as a pivot, and a rotation blade is decentered from a central axis of the base shaft part. Accordingly, the position of the rotation blade is changed by an operation of the rotation lever, and a force for pressing the rotation blade to the oil element can be adjusted by the rotation lever. This invention uses a means for rotating the oil element interlocked with a roller by rotary driving at least one roller.