PROBLEM TO BE SOLVED: To provide a combination container/syringe, capable of removing effectively air bubbles in a chemical liquid.SOLUTION: The combination container/syringe 1 includes: an outer tube 10 having an axis line O as a center a front stopper inserted into the distal end side of the outer tube 10 and a tube end 50 externally fitted over the outer periphery of the distal end of the outer tube 10 through a fitting hole 61 on the proximal end side, and having a bypass chamber 71 in which a front stopper is transferred on the front side of the fitting hole 61. In the combination container/syringe 1, the inner diameter of the bypass chamber 71 is formed larger than the outer diameter of the front stopper, on the inner peripheral face 73 of the bypass chamber 71, a plurality of ribs projecting toward the inside of the diameter direction, extending in the axis line O direction, and brought into tight contact with the outer peripheral face of the front stopper transferred into the bypass chamber 71, are provided at certain intervals in the peripheral direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】薬液内の気泡を効果的に除去することができる容器兼用注射器を提供することを目的とする。【解決手段】軸線Oを中心とする筒状をなす外筒10と、外筒10内の先端側に嵌入されるフロントストッパーと、基端側の嵌着孔61を介して外筒10の先端外周に外嵌され、該嵌着孔61の前方側にフロントストッパーが移入するバイパスチャンバー71を有する筒先50と、を備えた容器兼用注射器1において、バイパスチャンバー71の内径がフロントストッパーの外径よりも大きく形成されるとともに、バイパスチャンバー71の内周面73に、径方向内側に向かって突出するとともに軸線O方向に延びて、バイパスチャンバー71内に移入したフロントストッパーの外周面に密着するリブが、周方向に間隔をあけて複数設ける。【選択図】図3
