PROBLEM TO BE SOLVED: To provide a gasket pressing tool for syringe which can reduce the time lag between an administration operation of a high-viscosity substance and an actual outflow of the high-viscosity substance, and timely administer the high-viscosity substance to a targeted site in a favorable manner.SOLUTION: The gasket pressing tool comprises an assembly 6 including a gasket pressing member 8, a syringe mounting member 4, and a plunger 5. The syringe mounting member 4 includes a barrel mounting part 40 capable of housing a flange 23 of a barrel 20. The barrel mounting part 40 comprises: a distal side support portion 71 for supporting a distal surface of the flange； a proximal side support portion 72 for supporting a proximal surface； a coupling portion 73 for coupling the distal side support portion and the proximal side support portion； and a flange housing portion 44 defined by the distal side support portion, the proximal side support portion, and the coupling portion.SELECTED DRAWING: Figure 23COPYRIGHT: (C)2020,JPO&INPIT【課題】高粘性物質の投与操作と実際の高粘性物質の流出におけるタイムラグが少なく、目的とする部位に高粘性物質をタイミングよく、かつ良好に投与することが可能なシリンジ用ガスケット押圧具を提供する。【解決手段】 シリンジ用ガスケット押圧具は、ガスケット押圧部材８を備える組立体６、シリンジ装着部材４、プランジャ５を備える。シリンジ装着部材４は、バレル２０のフランジ２３を収納可能なバレル装着部４０を備え、バレル装着部４０は、フランジの先端面を支持する先端側支持部７１と、基端面を支持する基端側支持部７２と、先端側支持部と基端側支持部を連結する連結部７３と、先端側支持部、基端側支持部および連結部により形成されたフランジ収納部４４を備える。【選択図】図２３
