A rolling mill stand comprising two or more upper rolling rolls (1 8, 20), one roll forming an upper work roll and two or more lower rolling rolls (19, 21), one roll forming a lower work roll and comprising two housings, each housing being arranged at a respective axial end of said rolling rolls (18, 19, 20, 21), wherein, at a first of said two housings, there are provided two lower bending blocks (7, 7') and two upper bending blocks (101, 101') fixed to said first housing, a chock for the upper work roll and a chock for the lower work roll, a chock for the upper backing roll and a chock for the lower backing roll, a first axial shifting device (15, 15') for the upper work roll to produce a first horizontal translational movement of the upper work roll in a direction parallel to the axis thereof, a second axial shifting device (16, 16') for the lower work roll to produce a second horizontal translational movement of the lower work roll in a direction parallel to the axis thereof, wherein the chock of the lower work roll is constrained to the lower bending block (7, 7') by means of a first vertical sliding coupling, which allows said chock of the lower work roll to perform vertical movements, wherein each of the two upper bending blocks (101, 101') is a different structural element separated from the chock of the upper backing roll and comprises a first part (13, 13'), which forms a second vertical sliding coupling with a respective guide (17', 17) fixed on said first housing, and a second part (1, 1'), which forms an element for supporting the chock of the upper backing roll and the chock of the upper work roll, so that the chock of the upper backing roll and the chock of the upper work roll are constrained together to the two upper bending blocks (101, 101') characterised in that the first shifting device (15, 15') is integrally fixed directly to the two bending blocks (101, 101') of the upper backing roll, by means of structural elements or supporting arms (151, 151'), thereby allowing the integral lifting and lowering of the chock of the upper work roll, of the two upper bending blocks (101, 101') and of the first shifting device (15, 15') under load, while the rolling operation is in progress. two lower bending blocks (7, 7') and two upper bending blocks (101, 101') fixed to said first housing, a chock for the upper work roll and a chock for the lower work roll, a chock for the upper backing roll and a chock for the lower backing roll, a first axial shifting device (15, 15') for the upper work roll to produce a first horizontal translational movement of the upper work roll in a direction parallel to the axis thereof, a second axial shifting device (16, 16') for the lower work roll to produce a second horizontal translational movement of the lower work roll in a direction parallel to the axis thereof, wherein the chock of the lower work roll is constrained to the lower bending block (7, 7') by means of a first vertical sliding coupling, which allows said chock of the lower work roll to perform vertical movements, wherein each of the two upper bending blocks (101, 101') is a different structural element separated from the chock of the upper backing roll and comprises a first part (13, 13'), which forms a second vertical sliding coupling with a respective guide (17', 17) fixed on said first housing, and a second part (1, 1'), which forms an element for supporting the chock of the upper backing roll and the chock of the upper work roll, so that the chock of the upper backing roll and the chock of the upper work roll are constrained together to the two upper bending blocks (101, 101') characterised in that the first shifting device (15, 15') is integrally fixed directly to the two bending blocks (101, 101') of the upper backing roll, by means of structural elements or supporting arms (151, 151'), thereby allowing the integral lifting and lowering of the chock of the upper work roll, of the two upper bending blocks (101, 101') and of the first shifting device (15, 15') under load, while the rolling operation is in progress.