The invention relates to a combined burner which includes a pilot burner part and a powder burner part and is used for air-flowing type gasifying device, wherein gasifying medium isolates combustion powder from oxygen or the pilot burner part and the powder burner part are isolated by an inert gas curtain. As a result, the reaction velocity is reduced, the flame is extended, the flame temperature is decreased and the gasification flame is moved away from the burner end surfaces. The position and shape of the flame is modified in such a manner that the heat input into the burner end surfaces facing the hot gasification space is decreased and the wear caused by heat is reduced.