A fluid dispenser device comprising a fluid reservoir (10), and a dispensing member (20), such as a metering valve, fitted to said reservoir (10), said reservoir (10) and said valve (20) being assembled into a body (30) incorporating a dispensing orifice (31), said device being characterized in that it includes an adjustment element (40) disposed between the reservoir (10) and the body (30), said adjustment element (40) being provided with adapter means (45) that are movable and/or deformable and that co-operate with the body (30) and/or with the reservoir (10) while the reservoir (10) is being assembled into the body (30), thereby compensating for the manufacturing tolerances of said body (30) and/or of said reservoir and/or said dispensing member (20).