To prevent outflow of a petroleum in a tank toward outside of a tip nozzle or a body of a burner even if the burner body is inclined or fallen to orient the tip nozzle in that direction when heating an article to be heated from its side, inclined face and top face, and to prevent stain on clothes by accidental outflow of a fuel inside the burner in the liquid state when carrying it in a pocket or the like of the clothes.

In a heat conductive inner cylinder, a hygroscopic wick layer formed by materials of various fibers and an air tube with upper and lower ends opened are coaxially provided sequentially toward the inside, a flame hole is provided at the upper end of the inner cylinder and an oil filling port in the middle between the upper and the lower ends, respectively, a gas chamber is formed between the upper end face of the wick layer and the flame hole and an air inlet in the inner cylinder around the gas chamber, respectively, and an inner face of an outer cylinder is snug fitted to the outer side of the inner cylinder in capable of sliding.