This lighter (1) of the type comprising a reservoir for containing liquefied petroleum gas, a valve (3) mounted on the reservoir and permitting the gas to leave the same, a valve opening mechanism (4,5), as well as an ignition system comprising a flint (6) co-operating with a spark wheel (7) rotationally operated by at least one circular operating wheel (10) mounted co-axially with the spark wheel. This lighter is characterised in that each operating wheel is independent of the spark wheel and can pivot about its own axis independently of the spark wheel, and in that the axle is fixed to the spark wheel and comprises on its periphery zones which are concave and/or convex in transverse cross section, whereas the operating wheel comprises, in the region of its holes which enables its engagement on the axle, convex and/or concave zones, which are formed to slide with respect to the concave and/or convex zones of the axle when the force exercised on the operating wheel to ignite the lighter is below a threshold force, but engage with them when the force exercised is above the threshold force, and the largest cross sectional dimension of the axle is less than the smallest cross sectional dimension of die hole of the operating wheel, to permit the significant radial displacement of the operating wheel with respect to the axle and, below the said threshold force to permit the aid pivoting movement of the operating wheel with respect to the axle.

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