Patent ID: 8540691

Claim:
A drug solution transferring device comprising: a drug solution container provided with an opening; and a connection tool for connection to said drug solution container, wherein said drug solution container includes an elastic member for closing said opening, said elastic member is formed of a plurality of membranes overlaid together, said membrane has a projection projecting into said drug solution container, said connection tool includes a needle having a sharp tip end, said needle has a liquid hole extending in an extending direction of said needle, and when said needle penetrates through said projection of said membrane, an inside and an outside of said drug solution container are in communication with each other through said liquid hole to allow transference of the drug solution between said drug solution container and said connection tool, and wherein the plurality of membranes are disposed to be in direct contact with each other without a space formed therebetween before use of the drug solution container, and are independent of and not bonded with each other, and the elastic member is configured to catch drug solution between the plurality of membranes when the needle is removed from the drug solution container.