The present invention relates to a dispensing device (1) for a product comprising: - a supply inlet and a dispensing orifice (30), - a metering chamber (5) with a chamber inlet (51) connected to the supply inlet and a chamber outlet (52) connected to the dispensing orifice, - a bellows (6) laterally delimiting the metering chamber, - an inlet valve (10) for opening or closing the chamber inlet, - an outlet valve (20), arranged between the metering outlet and the dispensing orifice, to open or close the passage between the metering outlet and the dispensing orifice, in which the valve inlet is formed on the bellows by bi-injection with this bellows.
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