PROBLEM TO BE SOLVED: To provide a filter device which suppresses clogging of a filter element, and can stably capture a fine object to be captured.SOLUTION: A filter device 1 includes: a casing 12 having an inflow port 16, a flow channel 18, and an outlet port 22 a filter element 10 which is arranged on the casing 12 so as to cross over the flow channel 18 and has many holes 24 which pass through a rear surface 28 positioned on an outlet port 22 side from a surface 26 positioned on an inflow port 16 side and are smaller than an object to be captured 36 mixed in a fluid and a take-out port 14 which is arranged on the casing 12 and takes out the object to be captured 36. A recessed introduction part connected to the holes 24 on an upstream side of the holes 24 on the surface 26 and a recessed lead-out part connected to the holes 24 on a downstream side of the holes 24 on the surface 26 are arranged in a flow direction A of a fluid along the filter element 10. An end part on a hole 24 side of the lead-out part is positioned on a rear surface 28 side from an end part on a hole 24 side of the introduction part on a cross section along the flow direction A.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】フィルタ装置において、フィルタエレメントの目詰まりを抑制し、微細な捕捉対象物を安定して捕捉可能にする。【解決手段】フィルタ装置1は、流入口16、流路18及び流出口22を有するケーシング12と、ケーシング12に流路18を横断するように設けられ、流入口16側に位置する表面26から流出口22側に位置する裏面28に貫通し流体に混入している捕捉対象物36よりも小さい多数の孔24を有するフィルタエレメント10と、ケーシング12に設けられ、捕捉対象物36を取り出す取出し口14と、を備え、フィルタエレメント10に沿った流体の流れ方向Aにおいて、表面26における孔24の上流側に該孔24に連なる凹形状の導入部と、表面26における孔24の下流側に該孔24に連なる凹形状の導出部と、を有し、流れ方向Aに沿った断面において、導出部の孔24側の端部が、導入部の孔24側の端部よりも裏面28側に位置している。【選択図】図1
