PURPOSE: To carry out the titled rolling work, by first forming the stepped and inclined part over the specified length adjoining to the unrolled part of the metallic strip, by tearing off the part nearby the unrolled part, by removing the unrolled part from the coiler, and by coiling the inclined part.

CONSTITUTION: The roll gap of the rolling roll (b) is reduced under the condition that the unrolled part (c) is winding around the coiler when the pass preceding the final pass is finished, and the rolling work is applied to the specified length starting from the part adjoining to the unrolled part (c). This is the first stage step forming rolling work. Next, the gap of the roll (b) is opened, and a suitable length (d) of the metallic strip is uncoiled, the strip is backward rolled by the roll (b), and the second stage step forming rolling work is performed so far as the starting point of the first stage rolling work. Next, the third stage rolling work is performed in the direction as well as the first stage rolling work starting at the part adjoining to the part (c). Thus the rolling work is performed by gradually reducing the rolled length stage by stage, and the stepped inclined part is formed possessing thickness, the nearer to the part (c) the thinner. After that, the position nearby the part (c) is heavily reduced by the roll (b), and the tension is given to the metallic strip to tear off. After tearing off, the part (c) is removed, and the inclined part is coiled by the coiler beginning at the thinnest part, and the final rolling work is started.