PURPOSE: To obtain a high-quality rolled product automatically and efficiently when a short material etc., is rolled.

CONSTITUTION: 1st and 2nd reversal revolution changeable pinch rolls 35, 45 are mounted before and behind a mill body 15. When a work W is sent from the side of the 1st pinch roll 35 into between rolling rolls 12,113, a controller to control the pinch rolls 35, 45 controls the speed of the 1st pinch roll 35 so that it is slower than those of the rolling rolls 12, 13 and controls the speed of the 2nd pinch roll 45 so that it is faster than those of the rolling rolls 12, 13. When the work W is sent from the side of the 2nd pinch roll 45 into between rolling rolls 12, 13, the speed of the 2nd pinch roll 45 is controlled so that it is slower than those of the rolling rolls 12, 13 and the speed of the 1st pinch roll 35 is controlled so that it is faster than those of the rolling rolls 12, 13.