PROBLEM TO BE SOLVED: To provide an air trap chamber capable of reliably preventing blood coagulation by suppressing the diffusion of replenishing fluid in a replenishing fluid layer.SOLUTION: Provided is an air trap chamber 5 that is structured of a chamber including a receiving space connected to a blood-circulating blood circuit which is formable of an air layer, a replenishing fluid layer, and a blood layer, and that is characterized in trapping and removing, in the air layer, the air included in the blood circulating through the blood flow channel, the air trap chamber 5 comprising: a replenishing fluid introduction inlet 5ba capable of introducing replenishing fluid into the receiving space and a wall part 6 which is formed in a flow path of the replenishing fluid between the replenishing fluid introduction inlet 5ba and the receiving space, and which is capable of receiving replenishing fluid introduced through the replenishing fluid introduction inlet 5ba and letting the replenishing fluid flow into the receiving space.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2016,JPO&INPIT【課題】補液層の補液の拡散を抑制して血液凝固を確実に防止することができるエアトラップチャンバを提供する。【解決手段】血液を流通させる血液回路に接続されて空気層、補液層及び血液層を形成し得る収容空間を有したチャンバから成り、当該血液流路にて流通する血液に含まれる空気を空気層で捕捉して除去するためのエアトラップチャンバ5において、収容空間に補液を導入し得る補液導入口5baと、補液導入口5baと収容空間との間における補液の流動経路上に形成され、当該補液導入口5baから導入した補液を受けて収容空間に流入させ得る壁部6とを具備したものである。【選択図】図5
