At the tube cavity of the body which possesses the wall the filter device in order to use, the basic edge and the first long shaku condition component which possesses the point and, in the first long shaku condition component, approaching to that first end, as it is installed, as, with the second long shaku condition component which possesses the second end and at the interval which the second long shaku condition component alienates it is installed in the same second long shaku condition component the plural connected sections which sliding possibly are arranged includes to the first long shaku condition component. Second as for the long shaku condition component, the connected section mutually first at mean distance first is alienated at with form of long shaku condition and at the second mean distance where the connected section first is shorter than as for mean distance the second filter form which is alienated is movement possible.壁部を有する身体の管腔にて使用するためのフィルタ装置は、基端及び先端を有する第一の長尺状部材と、第一の長尺状部材に、その第一の端部に近接して取り付けられるとともに第二の端部を有する第二の長尺状部材と、第二の長尺状部材の離間した間隔にて同第二の長尺状部材に取り付けられるとともに第一の長尺状部材に摺動可能に配置される複数の連結部とを含む。第二の長尺状部材は、連結部が互いに第一の平均距離にて離間されている第一の長尺状の形態と、連結部が第一の平均距離よりは短い第二の平均距離にて離間されている第二のフィルタ形態との間にて移動可能である。
