PROBLEM TO BE SOLVED: To provide a flow rate control device having a novel structure and capable of securing liquid-tightness of a narrowed flow path.SOLUTION: A flow rate control device 10 is provided with: a narrowed flow path 26 mounted on a chemical liquid flow path 62 through which chemical liquid is infused into the body of a patient to adjust the flow rate of the chemical liquid； a groove forming member 20 where a recessed groove 24 extending while opening to the surface is formed； an elastic seal material 22 covering the opening of the recessed groove 24 to form the narrowed flow path 26； and a rigid housing 18 covering the outer surface of the elastic seal material 22.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】狭窄流路の液密性を確保することができる、新規な構造の流量制御装置を提供すること。【解決手段】薬液を患者の体内に注入する薬液流路６２上に設けられて、薬液の流量を調節する狭窄流路２６を備えた流量制御装置１０であって、表面に開口して延びる凹溝２４が形成された溝形成部材２０を備えていると共に、凹溝２４の開口を覆って狭窄流路２６を形成する弾性シール材２２と、弾性シール材２２の外面を覆う硬質のハウジング１８とが設けられている。【選択図】図４
