Abstract: An all-primary type gas burner which achieves exceptional heating capacity with a small combustion surface. The burner comprises a ceramic radiation plate, mixed gas distributors, a burner main body, upper and lower laterally extending supporting base plates, gas mixing tubes, Venturi-tubes, an air control plate, air control disks, and nozzles. The ceramic radiation plate broadly disperses combustion heat in all directions. It comprises a large number of ceramic rectangular tubes of varying lengths arranged so as to form a semi-cylinder projecting from the burner main body. At the tip of each tube is a gas blowing hole. The diameter at the bottom of the semi-cylinder is greater than that at the top. The mixed gas distributors uniformly distribute mixed gas so that it blows out all of the gas blowing holes with approximately uniform gas pressure. The mixed gas distributors each have a large number of gas distributing holes.