Liquid medicine-measuring device for liquid medicine-injecting device

A medical liquid feeding unit comprising:

• a medical liquid feeding device including an expandable container, an inlet port for supplying a medical liquid into the expandable container therethrough, and a feed duct for feeding to a patient the medical liquid discharged from one end of the expandable container by a contractive force of the expandable container, the medical liquid feeding device further including a hung member at the one end of the expandable container;
• a medical liquid meter for quantifying a remaining amount of the medical liquid stored in the expandable container, the medical liquid meter including a substantially tubular case having an open first end and a second end opposite the first end, a weight-measuring device movably disposed in the case for measuring the weight of the medical liquid feeding device, and a suspender provided at an end of the weight-measuring device and projecting beyond the open first end of the case, the suspender being configured for disengageably engaging the hung member so that the medical liquid feeding device can be suspended from the medical liquid meter for measuring the weight of the medical liquid feeding device;
• and a closed loop at the second end of the case of the medical liquid meter, a cord-shaped connection member being looped through the closed loop at the second end of the case for enabling the medical liquid meter to be retained in proximity to the medical liquid feeding device at times when the hung member is not suspended from the suspender.