PURPOSE: To improve the width accuracy and yield of a rolling stock by providing tapers to a table roll so as to reduce its diameters from its both sides toward its center, and slanting a pair of vertical rolls oppositely to the advancing direction of the stock.

CONSTITUTION: Each roll 2a of table rolls 2 is provided with tapers so that its diameters become smaller toward its center from its both side-ends. Further, a pair of right and left vertical rolls 1 are set by slanting them oppositely to the advancing direction of a rolling stock S, and the stock S is fed to the rolls 1 in this state. By the slant of the roll 1, the metal flowing state of stock S is changed, and the one-side floating state of stock S is restricted by the reaction from the roll 1. Further, by the taper formation of the roll 2, the downward warp-form of stock S is maintained and its deformation is restricted. Accordingly, the generation of buckling is prevented, the heavy rolling reduction can be performed, and the width accuracy of stock S is improved together with its yield.