A take-up device includes a fluid-pressure device, a pressure detection device, a pressure calculation mechanism, and a controller. The fluid-pressure device is a device for expanding and contracting a mandrel. The pressure detection device detects a pressure of a hydraulic fluid in the fluid-pressure device. The pressure calculation mechanism calculates a tightening pressure acting on the mandrel, based on the pressure detected by the pressure detection device. The controller controls the fluid-pressure device. Also, the controller performs position control until the number of turns of a strip reaches a value. The controller performs constant-pressure control after the number of turns of the strip reaches the value.