To provide a cutting device capable of efficiently introducing distortion when performance is improved by introducing distortion into an iron core of a transformer or a reactor using a directional electromagnetic steel plate, and continuously varying a distortion amount depending on an iron core position.

In the device for feeding and cutting the continuous steel plate to plates with set length and shape, a distortion applying device that preferably comprises three or more rolls and introduces a distortion to the steel plate by bending the steel plate in passing the steel plate between the rolls is disposed at a certain position short of a cutting position. A relative position of these rolls is continuously varied to vary the distortion amount introduced into the steel plate. This device may be provided with a mechanism for measuring a feeding distance of the steel plate, a distance from the cutting position of the steel plate to a distortion introducing position can be calculated, and the distortion amount can be varied in response to the distance.