To provide a level adjustment device for rolling mill spindle capable of executing level adjustment in high precision with simple operation and in short time.

When a spindle carrier 11a is ascended with driving a hydraulic cylinder 18, the upper faces of 12d, 12e of both ends of spindle carrier 11a are abutted on the tip of jack part 24 of manually operated jacks 22a, 22b, limiting further ascending, by maintaining the output of hydraulic cylinder 18 while measuring a level at this state, the abutted position between the tip of jack part 24 of manually operated jacks 22a, 22b and the upper faces 12d, 12e of both ends is adjusted by turning a handle with hand. By this method, a spindle 1a is set to a prescribed level.