PURPOSE: To prevent a valve element from being displaced toward a fluid passage by locating annular valve seats adapted to cooperate with a valve body so as to open and close the fluid passage, at positions facing two through-holes, symmetrically to each other about the valve axis, and by providing a resilient member for urging the annular valve seat toward the valve element.

CONSTITUTION: Fluid from an inlet port 4 flows through passages 7a, 7b and through openings 11, 12 which are formed symmetrically to each other in a valve element 9, and is then discharged from another opening 13. Annular seats 15a, 15b are attached at one side end of the passages 7a, 7b within a valve chamber 6, symmetrically to each other about the valve axis, and are located at positions facing respectively the openings 11, 12. Rail packing 16a, 16b are disposed in the bores thereof, and are urged toward the valve element 19 by Bellerville springs 17a, 17b. When the valve element 19 is rotated by an angle of 90 deg., the annular seats 15a, 15b are closed by the valve element 9 and are made into close contact with the valve element 9 by means of the Bellerville springs 17a, 17b so that the fluid is blocked, and further fluid pressures from the inlet port 4 are laterally symmetrically to each other, thereby it is possible to prevent the valve element 9 from being shifted.