Abstract: The present invention relates to a combustion nozzle for a gas lighter, particularly a nozzle structure provided with an internal, automatic flame extinguishing device. Within a nozzle cylinder is disposed a second valve for closing a to-be-closed portion under the action of a shape memory member. The second valve is provided with a push-back portion which undergoes an elastic deformation upon closing of the to-be-closed portion and thereby urge the shape memory member in a direction in which the shape memory member is pushed back. This structure permits omission of a return spring and hence reduction in the number of components used; besides, the shape memory member such as, for example, a shape memory alloy coil, can revert to its original shape to a sufficient extent even without imparting a bidirectional property thereto.