PROBLEM TO BE SOLVED: To improve usability by notifying a user of the remaining amount of a liquid-drug remaining in a liquid-drug storage part during the administration of the liquid-drug into a living body.SOLUTION: A display unit 306 displays the amount of a liquid-drug remaining in a liquid-drug bag 110, calculated by subtracting the amount of the liquid-drug administered to a user by the drive action of a delivery unit 130 from the amount of the liquid-drug that a liquid-drug filling device 5 has filled the liquid-drug bag 110 with. This allows the user to see how much of the liquid-drug remains in the liquid-drug bag 110, and thereby usability is improved.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明は、使い勝手を向上する。【解決手段】本発明は、薬液充填装置5が薬液バッグ110に充填した薬液の充填量から、送出部130が駆動することにより使用者に投与した薬液の投与量を減算した薬液バッグ110に残存する薬液の残量を表示部306に表示するようにしたことにより、使用者は薬液バッグ110に残存する薬液の残量を把握することができ、使い勝手を向上することができる。【選択図】図24