The invention relates to a device for co-metering liquid and/or pasty products, having: a first metering means (41) for metering a first product； a second metering means (42) for metering a second product (P2)； a nozzle (B) having a first duct (1) that is fed by the first metering means (41) and opens out at a first orifice (11), a second duct (2) that is fed by the second metering means (42) and opens out at a second orifice (21), and a third duct (3) that opens out at a third orifice (31), the device being configured such that the third duct (3) is fed by the first and second metering means (41, 42) such that a mixture of the first and second products is discharged by said third orifice (31). The invention also relates to an associated metering method.
