[Problem] The purpose is to provide a liquid medicine administration device which can make it possible to determine the residual volume of a liquid medicine remaining in the body of a user with taking the activity of the user into consideration, and to achieve the administration of the liquid medicine in a proper feed volume that is determined on the basis of the above-determined residual volume.[Solution] A liquid medicine administration device is provided with: a liquid feeding section 100 for feeding a liquid medicine to the body of a user； a first control section 260 for controlling the liquid feeding operation of the liquid feeding section； an activity detection section 60 for detecting the activity of the user on the basis of the movement of the body of the user； a second storage section 51 for storing already-fed solution data that relates to the volume of the liquid medicine already fed to the body by the liquid feeding section； and a calculation section 261 for calculating the residual volume of the liquid medicine in the body on the basis of both the already-fed solution data stored in the second storage section and the activity detected by the activity detection section, and for calculating a scheduled feeding volume of the liquid medicine to be administered to the body on the basis of the aforementioned residual volume of the liquid medicine. The first control section controls the liquid feeding operation of the liquid feeding section in such a manner that the scheduled feeding volume of the liquid medicine can be fed to the body.L'objet de la présente invention est de fournir un dispositif d'administration de médicament liquide qui permet de déterminer le volume résiduel d'un médicament liquide restant dans le corps d'un utilisateur en prenant en considération l'activité de l'utilisateur, et de réaliser l'administration du médicament liquide dans un volume d'alimentation approprié qui est déterminé sur la base du volume résiduel déterminé ci-dessus.
