PROBLEM TO BE SOLVED: To improve a tiling structure of a ceramic tile, and to prevent intrusion of flow of powder fuel through a joint of the ceramic tile in a fan-shaped straightening vane of a burner nozzle for burning solid carbonaceous powder fuel such as powder fuel.SOLUTION: A straightening vane 11 has an almost fan-shaped cross section including a curved surface part 18 and a bent plane part 17 constituted by a plane part 17a and an inclined plane part 17b, and a ceramic tile 12 is stuck to an outer surface thereof. A protrusion P is provided on an upstream side end of the powder fuel flow direction in which the curved surface part 18 and the plane part 17a are jointed by protruding an end of the ceramic tile 12c stuck to the curved surface part 18 side from the outer surface of the bent plane part 17, and a joint surface 16 with the ceramic tile 12d stuck to an end of the bent plane part 17 and the outer surface of the plane part 17a is arranged in a rear part of the protrusion P in the view from the powder fuel flow direction upstream side.