To prevent solid oxide from being adhered and accumulated to/in a burner body or the periphery of the burner, operate stably and continuously for a long time, and burn efficiently a combustible liquid such as waste, etc., containing a compound containing silicon.

This burner is provided with a central tube 1 for jetting a liquid containing elements producing solid oxide, a first outer tube 2 for jetting a combustion supporting gas and/or incombustible gas outside the central tube, a second outer tube 3 for jetting the combustion supporting gas and/or incombustible gas in the first outer tube 2, and a flow route for supplying the combustion supporting gas and/or incombustible gas outside the second outer tube as necessary, and it is further provided with a cocentric multiple structure and allows a liquid jetting from the central tube to be sprayed and burnt by the combustion supporting gas and/or incombustible gas fed from the flow route outside thereof. Furthermore, it prevents blocking of generating flame or blocking due to combustion products covered by the combustion supporting gas and/or incombustible gas supplied from the flow route arranged outside thereof.