To provide a pulverized coal burner which performs further low NOx combustion by increasing the adjustment width of a mixing state of pulverized coal-mixed flow and secondary air, and obtains the optimum combustion state according to the concentration of the pulverized coal or the quality of coal.

In this pulverized coal burner 5 in which a nozzle body 6 opened toward a furnace 1, has an outer burner nozzle 8 jetting the pulverized coal-mixed flow 14, and an inner burner nozzle 9 concentrically disposed inside the outer burner nozzle, and jetting the tertiary air 27, and a wind box 4 disposed in while surrounding the circumference of the nozzle body and jetting the secondary air 26 from the circumference of the nozzle body, has a secondary air swirling means 24 for giving swirling force to the secondary air, a tertiary air swirling means 19 is disposed inside the inner burner nozzle to give the swirling force to the tertiary air, and the shearing force is acted on the jetted pulverized coal-mixed flow from the inside by the tertiary air, so that the pulverized coal-mixed flow is expanded and diffused to enhance the mixing of the secondary air and the pulverized coal-mixed flow.