A rolling mill of four-high or more that includes a plurality of rolls including at least a pair of work rolls (1,2) and a pair of backup rolls (3,4) supporting the work rolls (1,2), wherein any one roll among respective rolls arranged in a vertical direction is adopted as a reference roll, the rolling mill comprising: a measurement apparatus (24a-d,25a-d,34a-d,35a-d) which measures at least rolling direction forces in a rolling direction which act on roll chocks (5a,6a) on a work side and roll chocks (Sb,6b) on a drive side of each of the rolls other than the backup rolls (3,4); a pressing apparatus (9,10,13) which, with respect to at least roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll, is provided on either one of an entrance side and an exit side in the rolling direction of a workpiece, the pressing apparatus (9,10,13) pressing the roll chocks (5a-b,6a-b,7a-b) in the rolling direction; a driving apparatus (11,12,14) which, with respect to at least roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll, is provided so as to face the pressing apparatus (9,10,13) in the rolling direction, the driving apparatus (11,12,14) moving the roll chocks (5a-b,6a-b,7a-b) in the rolling direction; and a position control unit that fixes a rolling direction position of roll chocks (8a-b) of the reference roll as a reference position, and based on a rolling direction force difference that is a difference between a rolling direction force on the work side and a rolling direction force on the drive side, drives the driving apparatus (11,12,14) to control positions, in the rolling direction, of the roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll so that the rolling direction force difference of each of the rolls becomes a value within an allowable range. wherein any one roll among respective rolls arranged in a vertical direction is adopted as a reference roll, the rolling mill comprising: a measurement apparatus (24a-d,25a-d,34a-d,35a-d) which measures at least rolling direction forces in a rolling direction which act on roll chocks (5a,6a) on a work side and roll chocks (Sb,6b) on a drive side of each of the rolls other than the backup rolls (3,4); a pressing apparatus (9,10,13) which, with respect to at least roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll, is provided on either one of an entrance side and an exit side in the rolling direction of a workpiece, the pressing apparatus (9,10,13) pressing the roll chocks (5a-b,6a-b,7a-b) in the rolling direction; a driving apparatus (11,12,14) which, with respect to at least roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll, is provided so as to face the pressing apparatus (9,10,13) in the rolling direction, the driving apparatus (11,12,14) moving the roll chocks (5a-b,6a-b,7a-b) in the rolling direction; and a position control unit that fixes a rolling direction position of roll chocks (8a-b) of the reference roll as a reference position, and based on a rolling direction force difference that is a difference between a rolling direction force on the work side and a rolling direction force on the drive side, drives the driving apparatus (11,12,14) to control positions, in the rolling direction, of the roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll so that the rolling direction force difference of each of the rolls becomes a value within an allowable range. a measurement apparatus (24a-d,25a-d,34a-d,35a-d) which measures at least rolling direction forces in a rolling direction which act on roll chocks (5a,6a) on a work side and roll chocks (Sb,6b) on a drive side of each of the rolls other than the backup rolls (3,4); a pressing apparatus (9,10,13) which, with respect to at least roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll, is provided on either one of an entrance side and an exit side in the rolling direction of a workpiece, the pressing apparatus (9,10,13) pressing the roll chocks (5a-b,6a-b,7a-b) in the rolling direction; a driving apparatus (11,12,14) which, with respect to at least roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll, is provided so as to face the pressing apparatus (9,10,13) in the rolling direction, the driving apparatus (11,12,14) moving the roll chocks (5a-b,6a-b,7a-b) in the rolling direction; and a position control unit that fixes a rolling direction position of roll chocks (8a-b) of the reference roll as a reference position, and based on a rolling direction force difference that is a difference between a rolling direction force on the work side and a rolling direction force on the drive side, drives the driving apparatus (11,12,14) to control positions, in the rolling direction, of the roll chocks (5a-b,6a-b,7a-b) of the rolls other than the reference roll so that the rolling direction force difference of each of the rolls becomes a value within an allowable range.