Patent ID: 7581561

Claim:
A closure for a connector having a housing, said housing having an opening portion opened to the outside, a connecting port connected to a tube and a flow channel space that allows flow of liquid through said connecting port, said closure comprising: a valve member for attachment to said opening portion and for allowing a liquid from outside to flow into said flow channel space after opening of said valve member, said valve member comprising a main body portion that seals said opening portion liquid tight and can be moved to the side of said flow channel space under the pressing force from the outside, said main body portion having an outer surface facing the outside and an inner surface facing the flow channel space while said opening portion is blocked liquid tight; a supporting portion connected to said main body portion and engaged to said housing, the supporting portion having an elastic force that acts on said main body portion when said main body portion moves to the side of said flow channel space under the pressing force from the outside; and an inner slit formed in said main body portion from said inner surface toward said outer surface, the inner slit being spaced from the outer surface, wherein a connecting surface formed on said outer surface of the main body portion is connected to said flow channel space when said main body portion is pressed into the side of said flow channel space under the pressing force from outside.