Abstract: A piezo ignition device (1) includes a piezo electric crystal (16), which is intended to generate a spark on an electrode (3) in said device when subjected to force. The ignition device (1) is mounted parallel with a mixer pipe (5) for delivering fuel to an open-air cooking apparatus, and the piezo electric crystal (16) is arranged so that the force applied to the crystal is directed parallel with the mixer pipe (5), wherein the force acting on the ingition device (1) for the ignition of said device is arranged to be applied parallel with said ignition device (1) in a direction from the electrode (3).