A fluid control valve, the fluid control valve being adapted to be used in a surge tank mounted to an intake system for an engine, wherein the surge tank is divided into a first surge chamber and a second surge chamber by a partition wall; wherein a part of the partition wall is open and serves as a fluid passage; wherein, when the engine is driven in a state where the fluid control valve is at the closed position, a pressure is alternately applied to the first surge chamber and the second surge chamber due to an air intake operation performed by each of the cylinders of the engine in a predetermined order, the fluid control valve comprising: a body forming the fluid passage and including a sealing surface (13 a, 13b) positioned in the fluid passage; a valve body configured to rotate between an open position and closed position within the fluid passage; a pair of elastic sealing members (17A, 17B), one positioned at the first surge chamber side and the other positioned at the second surge chamber side, provided at a rim portion of the valve body; and a lip portion extended from each of the elastic sealing members (17A, 17B); wherein each of the lip portions is adapted to contact the sealing surface (13a, 13b) and a surface of each of the lip portions facing the sealing surface (13a, 13b) is exposed to the fluid passage, the valve body has a valve main body; the valve main body is elastically deformable in accordance with a pressure difference between the first surge chamber and the second surge chamber, each of the lip portions includes a base portion extended from the corresponding elastic sealing member (17A, 17B) to be directed towards a center portion of the valve body when the valve body is at the closed position and a tip end portion connected to the base portion and directed to the sealing surface (13a, 13b) when the valve body is at the closed position, when the valve main body is in the closed position and is elastically deformed, the tip end portion of the lip portion of one of the elastic sealing members (17A, 17B) contacts the sealing surface via a surface contact and the tip end portion of the lip portion of the other elastic sealing member (17A, 17B) contacts the sealing surface via a line contact, and the lip portion includes a first contact portion provided between the base portion and the tip end portion and configured to contact with either the corresponding elastic sealing member (17A, 17B) or the valve body in a process after the tip end portion comes to contact the sealing surface (13a, 13b). a body forming the fluid passage and including a sealing surface (13 a, 13b) positioned in the fluid passage; a valve body configured to rotate between an open position and closed position within the fluid passage; a pair of elastic sealing members (17A, 17B), one positioned at the first surge chamber side and the other positioned at the second surge chamber side, provided at a rim portion of the valve body; and a lip portion extended from each of the elastic sealing members (17A, 17B); wherein each of the lip portions is adapted to contact the sealing surface (13a, 13b) and a surface of each of the lip portions facing the sealing surface (13a, 13b) is exposed to the fluid passage, the valve body has a valve main body; the valve main body is elastically deformable in accordance with a pressure difference between the first surge chamber and the second surge chamber, each of the lip portions includes a base portion extended from the corresponding elastic sealing member (17A, 17B) to be directed towards a center portion of the valve body when the valve body is at the closed position and a tip end portion connected to the base portion and directed to the sealing surface (13a, 13b) when the valve body is at the closed position, when the valve main body is in the closed position and is elastically deformed, the tip end portion of the lip portion of one of the elastic sealing members (17A, 17B) contacts the sealing surface via a surface contact and the tip end portion of the lip portion of the other elastic sealing member (17A, 17B) contacts the sealing surface via a line contact, and the lip portion includes a first contact portion provided between the base portion and the tip end portion and configured to contact with either the corresponding elastic sealing member (17A, 17B) or the valve body in a process after the tip end portion comes to contact the sealing surface (13a, 13b).