A fluid dispenser characterized in that it comprises: a gas reservoir (12) defining an actuating wall (120) for causing the volume of the reservoir to vary, and thereby driving the gas out of said reservoir; at least one fluid reservoir (13) defining an actuating wall (130) for causing the volume of the reservoir to vary and thereby driving the fluid out of said reservoir; at least one outlet orifice (141) common to the gas reservoir (12) and to a fluid reservoir (13); a gas feed duct (15) which connects the gas reservoir (12) to the common outlet orifice (141); and at least one fluid feed channel (16) which connects a fluid reservoir (13) to the common outlet orifice (141).