Problem to be solved: to provide a fluid passage opening / closing device capable of opening and closing an opening of the fluid passage portion with high accuracy.Fluid passage switching deviceA spool with a through hole insideCoyle wound around through holes against the spoolA movable iron piece which is contained in a through hole in a state capable of rotating around a pivot shaftFirst member andThe first member has a second member extending from one end in the extending direction to the movable iron pieceA yoke provided on the second member is provided with a suction portion arranged so that the movable iron piece can be sucked and rotated in response to the energization state of CoyleA fluid passage portion having an opening provided near the suction portion and closer to the suction portion than the rotary shaft is provided.Diagram【課題】流体通路部の開口部を高い精度で開閉可能な流体通路開閉装置を提供すること。【解決手段】流体通路開閉装置が、貫通孔が内部に設けられたスプールと、スプールに対して貫通孔まわりに巻回されたコイルと、回動軸を中心に回動可能な状態で貫通孔に収容された可動鉄片と、第１部材と、第１部材のその延在方向の一端部から可動鉄片に向かって延びる第２部材とを有し、コイルの通電状態に応じて可動鉄片を吸引して回動させることができるように配置された吸引部が第２部材に設けられているヨークと、回動軸よりも吸引部の近くでかつ吸引部の近傍に設けられている開口部を有する流体通路部とを備える。【選択図】図３
