Abstract: A disposable lighter with safety ignition unit is comprised of a body and a head, wherein a nozzle, a ring, a wind mask, a lever press plate, a spring, a flint, a bracket and an igniting wheel set with safety ignition unit are arranged on said head. The igniting wheel set with safety ignition unit includes two central axles, two cinctures and an ignition wheel which is used to make friction with said flint so as to generate sparks, said two cinctures are located on each end of said igniting wheel, the inner diameter(s) of said cincture is slightly larger than the outer diameter of the portions of the igniting wheel set which they encircle, so as to form the rotation of the cinctures as “sliding wheels.” The two central axles are supported on the bracket of the outer head and act as common rotational axle of said cinctures and igniting wheel.