A fluid dispensing device including a deformable chamber having an interior volume arranged to contain a fluid, and a dispensing valve for opening and closing an outlet in fluid communication with the interior volume of the deformable chamber. The dispensing valve includes a pin and a movable member. The pin has and end which, in the closed state of the dispensing valve, closes the outlet of the chamber and in the open state of the dispensing valve, deviates from the outlet of the chamber, the movable member being arranged to move under the effect of a decrease of the interior volume of the chamber or an overpressure from the fluid in the interior volume of the chamber above a certain threshold so as to move the pin away from the outlet of the chamber so as to move the dispensing valve from its closed state to its open state.