Patent ID: 7322969

Claim:
A liquid-medicine injection port device, comprising: an inlet member having a liquid-medicine inlet which is formed at an upper end thereof; an outlet member having a liquid-medicine outlet which is formed at a lower end thereof, the liquid-medicine outlet being dimensioned and configured to be connected to an inside of a liquid-medicine container; a liquid passageway which connects the liquid-medicine inlet and the liquid-medicine outlet; a germ-removal filter which is provided in the liquid passageway; and a closure which closes the liquid passageway underneath the germ-removal filter, wherein: a cross-sectional area of the liquid passageway near the liquid-medicine outlet is smaller than a cross-sectional area of the liquid passageway just above the germ-removal filter; and the closing by the closure is opened by injection pressure of a liquid medicine which is injected from the liquid-medicine inlet of the inlet member.