Fluid product dispensing valve

A fluid dispenser valve for mounting on a neck of a receptacle containing the fluid, said valve comprising a valve body including a metering chamber and a valve member movable in said metering chamber between a rest position and a dispensing position, said metering chamber having a top gasket and a bottom gasket co-operating in leaktight manner with said valve member, said valve including a neck gasket co-operating in leaktight manner with said valve body and with said receptacle neck, said neck gasket being made integrally as a single piece with one of said top and bottom gaskets of the metering chamber.