Plate rolling mill

A plate rolling mill comprising:

• a pair of work rolls that hold and press down a plate material therebetween;
• a plurality of backup rolls that prevent the work rolls from being deformed;
• and
• intermediate rolls each of which is disposed between the work roll and the backup roll so as to be shiftable in axial directions thereof,
• characterized in that each of the intermediate rolls comprises:
• a contact roll portion that contacts with the backup roll;
• and
• an extension barrel portion that is connected to an end of the contact roll portion and does not contact the backup roll at any shifted position,
• wherein the contact roll is formed to have a convex shape such that a convex center of the contact roll is positioned at a side of the extension barrel portion.