Abstract: A burner of the air adjustment type using a liquid fuel includes a fuel chamber including a bottom wall, a peripheral side wall and at least one fuel gas opening on the top surface portion of the fuel chamber and a burner proper including a fuel chamber attachment, an inner gas chamber and a plurality of final gas openings arranged and distributed annularly on the ceiling wall of the gas chamber. The burner proper further includes variable air openings connected to the gas chamber, wherein an annular variable air passage surrounding the fuel chamber and being connected to the variable air openings at a position lower than the position of the fuel gas opening is formed between the inner face of the peripheral side wall of the gas chamber of the burner proper and the outer face of the peripheral side wall of the fuel chamber.