APPAREIL D'ADMINISTRATION DE MÉDICAMENT, PROCÉDÉ D'UTILISATION D'APPAREIL D'ADMINISTRATION DE MÉDICAMENT ET PROCÉDÉ DE FABRICATION D'APPAREIL D'ADMINISTRATION DE MÉDICAMENT
A drug-solution administration device includes a syringe, a gasket, a plunger member, and a temporary holding portion. The temporary holding portion holds the plunger member in a state where the gasket and an opening formed on the opposite side of a distal end portion of a body portion of the syringe are opposite to each other with a gap between the gasket and the opening.