A fluid dispenser device (1) for associating with a fluid reservoir (3), the device including at least one check valve (12, 2) that is suitable for controlling the flow of fluid through the device, the check valve comprising a seat (12), and a movable valve member (2) that defines a contact zone that is suitable for bearing against the seat (12) in leaktight manner, the device including resilient prestress means (23) that urge the valve member in leaktight contact against its seat (12) at rest, the device being characterized in that the prestress means (23) are formed integrally with the valve member.