PROBLEM TO BE SOLVED: To provide an expired gas collection syringe vessel which is easily determined to have been used or not used and is compact before being used.SOLUTION: The expired gas collection syringe vessel includes: a cylinder 2 which collects thereinto expired gas introduced from an upper end part of the vessel a piston 3 which is inserted into the cylinder 2 from a lower end part of the cylinder 2 an introduction cylinder 31 which is provided in an upper end part of the vessel and has an introduction port 47A for introducing expired gas into the cylinder 2, formed therein and a valve member 32 which is disposed on the side lower than the introduction port 47A in the introduction cylinder 31 and opens the introduction port 47A by an expired-gas introduction pressure in response to introduction of expired has into the introduction cylinder 31 and closes the introduction port 47A in response to stop of introduction of expired gas.COPYRIGHT: (C)2012,JPO&INPIT【課題】使用前後の判別が容易で、かつ使用前の状態でコンパクトである呼気捕集シリンジ容器を提供すること。【解決手段】上端部から導入された呼気を内部に捕集するシリンダ2と、シリンダ2の内側に、その下端部から挿入されたピストン3と、上端部に設けられると共に、呼気をシリンダ2内に導入する導入口47Aが形成された導入筒31と、導入筒31内において導入口47Aよりも下側に配設され、導入筒31に呼気が導入されたときに呼気の導入圧により導入口47Aを開放すると共に、呼気の導入を停止したときに導入口47Aを閉塞する弁部材32と、を備える。【選択図】図2
