A spray head for a fluid dispenser comprises a connecting duct for sealingly receiving a delivery tube stub of an aerosol valve; a spray orifice; a chamber connecting the connecting duct and the orifice; a piston member disposed in the chamber and presenting a needle member cooperating with the orifice; and a spring urging the piston member to the orifice. The orifice is sealed by the end of the needle member in an inoperative position, and the piston member is arranged to move against the force exerted by the spring under the influence of an elevated pressure prevailing in the chamber, whereby the orifice is cleared by the needle member. To provide for improved atomization, according to the invention, the rear face of the piston member, which faces away from the needle member, defines a closed space which through a channel is in communication with a point located near the spray orifice for the injection of air from the closed space into the product stream to be sprayed through the spray orifice.