To provide a valve capable of preventing its sealing performance and operability from being degraded because of fluid pressure or the rotational operation of a valve element.

A valve element housing hole 30 provided with an inlet passage 23 and an outpet passage 25 and a valve seat surface having openings as communication ports for the other sides of the inlet passage 23 and the outlet passage 25 in the fettorn surface are provided in a valve case 26, a valve element 33 provided with a communication passage 34 is housed in the valve element housing hole 30, and is elastically supported by the valve case 26 in a pressed-to-contact state with the valve seat surface side by a pressing spring member 36 and a connecting member 38, a rotation operating means 39 rotationally operating the valve element 33 to a valve opening position or a valve closing position, is provided to a stem 32 at the upper end side of the valve element 33, valve ports at both end sides for the communication passage 34 of the valve element 33, are opened to a bottom surface pressed into contact with the valve set surface, and an intermediate portion mutually communicating the valve ports, is embedded in the inside of the valve element 33. Therefore, by miniaturizing the pressure receiving area of the valve element 33, stable sealing performance is obtained with a comparatively low spring pressure, to smoothly open/close the valve by lowering spring pressure.