Drug solution delivery device is provided with a liquid chemical delivery device body, inhalation and discharge of liquid and a syringe and a vial of the drug is housed. And a three-way stopcock, one end of which is connected to the third port of the three-way stopcock, a tube that is connected to the puncture needle to the other end, the drug solution delivery device body is removably attached to the first port of the three-way stopcock, gas is passed through a filter, but bacteria do not pass, provided on the second port of the three-way stopcock, I has a connection apparatus that vial is connected, and a connecting portion.薬液投与器具は、薬液投与器具本体と、液体の吸入・排出が可能なシリンジと、薬剤が収納されたバイアルとを備えている。薬液投与器具本体は、三方活栓と、一端側が三方活栓の第3のポートに接続され、他端側に穿刺針が接続されたチューブと、三方活栓の第1のポートに着脱自在に装着され、気体は通過するが細菌は通過しないフィルタと、三方活栓の第2のポートに設けられ、バイアルが接続される接続器具と、連結部とを有している。
