Abstract: A fuel/air mixture device for a dual injection valve including a single-part element which is suitable for various fuel injection valves without further adjustment measures. The single part element includes an envelope bush portion in contact with the injection end of the fuel injection valve in the form of stop surfaces and, together with this injection end, forms a narrow air gap so that the air is accelerated to almost sonic velocity and the fuel sprayed from the fuel injection openings is finely atomized. The device is particularly suitable for injecting a fuel air mixture into the induction pipe of an internal combustion engine with externally induced ignition.