The invention relates to a device (18) for introducing a reductant into an exhaust gas system of an internal combustion engine comprises a reductant connection (42) and an injection valve (20) for the reductant. According to the invention, the device (18) has an air connection (42), a mixing chamber (78), which is connected both to the outlet (46) of the injection valve (20) and to the air connection (54), and a discharge nozzle (72), which has a fluid connection to the mixing chamber (78) for discharging the reductant/air mixture.