According to one aspect of the present invention, provided is a needle plate stamp which is used while coupled to a vial for accommodating a liquid drug. The needle plate stamp comprises: a viscoelastic coupler which is detachably connected to a front end opening of the vial, and has a vial connection chamber formed therein； a stamp cover which includes a coupler connection part that is connected to the viscoelastic coupler, and a needle tip guide part that communicates with the coupler connection part from in front of the coupler connection part, the stamp cover having a drug delivery chamber formed therein； a needle tip which includes a tip cap that slides in a straight line along the needle tip guide part, and a plurality of non-rotational needle plates that are disposed inside the tip cap, wherein a plurality of needles capable of contacting the external skin are formed in front of the non-rotational needle plates, and a plurality of rear protrusions accommodated in the drug delivery chamber are formed behind the non-rotational needle plates； and a drug delivery mechanism which blocks a path between the vial connection chamber and the drug delivery chamber when the needle tip is in the forward state, and opens a drug delivery path between the vial connection chamber and the drug delivery chamber when the needle tip is retracted.Selon un aspect de la présente invention, l'invention concerne un tampon à plaque d'aiguille qui est utilisé en étant couplé à un flacon pour recevoir un médicament liquide. Le tampon à plaque d'aiguille comprend : un coupleur viscoélastique qui est raccordé de façon détachable à une ouverture d'extrémité avant du flacon, et comporte une chambre de raccordement de flacon formée à l'intérieur de celui-ci； un couvercle de tampon qui comprend une partie de raccordement de coupleur qui est raccordée au coupleur viscoélastique, et une partie de guidage de pointe d'aiguille qui communique avec la partie de raccordement de coupleur depuis l'avan
