PROBLEM TO BE SOLVED: To provide a flow control valve capable of suppressing generating of backlash on a movable shaft.SOLUTION: A flow control valve 100A includes a movable shaft 140 disposed inside of a cylindrical portion 121 of a housing 120 and restricted in a circumferential rotation to the cylindrical portion 121, a flow channel formation member 130 having an outflow port 132, and a valve element 150 moving integrally with the movable shaft 140, and opening and closing the outflow portion by being kept into contact with and separated from a peripheral edge portion 132R of the outflow port. When an axial interval between an upper portion 151U in a gravity direction of a contact face 151 of the valve element 150 and a peripheral edge portion 132R is regarded as an upper interval LU, and an axial interval between a lower portion 151D in the gravity direction of the contact face 151 and the peripheral edge portion 132R is regarded as a lower interval LD, the flow control valve 100A is constituted so that the upper portion 151U is positioned at an upper part in the gravity direction, of the lower portion 151D, and the upper interval LU is smaller than the lower interval LD.SELECTED DRAWING: Figure 7【課題】可動軸にがたつきが発生することを抑制可能な流量制御弁を得る。【解決手段】流量制御弁１００Ａは、ハウジング１２０の筒状部１２１の内側に配置され、筒状部１２１に対して周方向に回転することが規制された可動軸１４０と、流出口１３２が形成された流路形成部材１３０と、可動軸１４０と一体的に移動し、流出口の周縁部１３２Ｒに離接することによって流出口を開閉する弁体１５０とを備える。弁体１５０の当接面１５１のうちの重力方向における上部１５１Ｕと周縁部１３２Ｒとの間の軸方向における間隔を上部間隔ＬＵとし、当接面１５１のうちの重力方向における下部１５１Ｄと周縁部１３２Ｒとの間の軸方向における間隔を下部間隔ＬＤとすると、流量制御弁１００Ａは、上部１５１Ｕが下部１５１Ｄよりも重力方向における上方に位置し、かつ上部間隔ＬＵが下部間隔ＬＤよりも小さくなるように構成されている。【選択図】図７
