BURNER DIFFUSER

PROBLEM TO BE SOLVED: To provide a burner diffuser hard to be destroyed by the difference of the coefficient of thermal expansion among members and of which members constituting a dish are securely held always with regular relative positions. SOLUTION: A burner diffuser comprises a main body having a structure comprising an outer cylinder and an inner cylinder located inside the outer cylinder connected by a plurality of ribs, and a plurality of ceramic pieces forming together a dish covering the region between the outer cylinder and the inner cylinder on the opening surface of the main body part. The ceramic pieces have T cross section having a fan-shaped main face part and a leg erected on the main face and used for the connection with the ribs, the shafts erected on the ribs are pierced through the leg parts of the ceramic pieces, and the legs are pressed on the ribs by ceramic pieces through presser plates pierced with the shafts which are pierced through the leg parts of the ceramic pieces.