Valve for dispensing a fluid product

A fluid dispenser valve for mounting on a neck of a reservoir containing fluid, said valve comprising a valve body including a metering chamber, and a valve member that is movable in said metering chamber between a rest position and a dispensing position, said metering chamber including an upper gasket and a lower gasket that co-operate in leaktight manner with said valve member, said valve including a neck gasket that co-operates in leaktight manner with said valve body and with said receptacle neck, said valve being characterized in that said valve body is made as a single piece, and in that said neck gasket and said lower gasket are overmolded on the single-piece valve body.