An induction device for an internal combustion engine with an intake pipe having dimensions which can be varied within predetermined limits. The intake pipe is made up of at least one resonance pipe (R) coupled via a resonance volume (43) with at least one ram pipe (S) leading to an inlet of a respective cylinder of the engine. A supercharging of the resonance pipe and/or the ram pipe can be realized in the entire intake pipe, and the dimensions of resonance pipes (R) and the ram pipes (S) can be continuously varied within predetermined limits.