To provide a burner capable of realizing stable ignition and burning even when fine powder coal less containing volatile contents such as semi-anthracite is used.

This fine powder coal firing burner 20 comprises a separator 3 separating fine powder coal mixture 2 formed of carrying gas and fine powder solid fuel into concentrated fine powder coal mixture with highly concentrated fine powder coal and lean fine powder coal mixture with fine powder coal low in concentration than that of the concentrated fine powder coal mixture, a concentrated fine powder coal tube 5b allowing the concentrated fine powder coal mixture separated from the separator 3 to flow therein, a fine powder coal injection nozzle 10 continuously connected to the concentrated fine powder coal tube 5b, a lean fine powder coal tube 5c allowing the lean fine powder coal mixture separated from the separator 3 to flow therein, a fine powder coal injection nozzle 10 continuously connected to the lean fine powder coal tube 5c, and a concentrated/lean forming device 12 disposed in the concentrated fine powder coal tube 5b and generating shading in concentration of fine powder coal in the concentrated fine powder mixture.