An air-cooled gas burner , comprising: - a plurality of ramp-like elements , each of which is disposed along a respective extension plane, parallel to a longitudinal direction (L) and to an intake direction (A) and includes a first intake duct and a second intake duct , having a respective inlet and an outlet , wherein the first and the second intake duct are oriented in the extension plane of the respective ramp-like element and are spaced from each other along the longitudinal direction (L), and wherein the plurality of ramp-like elements are disposed in succession along a transverse direction (T) perpendicular to the longitudinal direction (L) and to the intake direction (A); - a manifold , configured to feed the gas to the inlets of the first and second intake ducts of the plurality of ramp-like elements , wherein the first and second intake ducts of the plurality of ramp-like elements are configured to suck the gas and primary air into their respective inlets by the Venturi effect; - for each of the plurality of ramp-like elements , a respective diffuser , disposed at the outlet of the first and of the second intake duct , and defining a plurality of holes from which a flame is generated by combustion of the gas coming from the first and the second intake duct ; - a plate positioned between the first and second consecutive ramp-like elements , wherein the plate defines an opening for the passage of secondary air, wherein, for each of the first and second consecutive ramp-like elements , the diffuser extends along the longitudinal direction (L) and defines a respective row of holes disposed in succession along the longitudinal direction (L), wherein the opening for the passage of secondary air has a length which, along the longitudinal direction (L), is at least equal to the length of the row of holes along the longitudinal direction (L). - a plurality of ramp-like elements , each of which is disposed along a respective extension plane, parallel to a longitudinal direction (L) and to an intake direction (A) and includes a first intake duct and a second intake duct , having a respective inlet and an outlet , wherein the first and the second intake duct are oriented in the extension plane of the respective ramp-like element and are spaced from each other along the longitudinal direction (L), and wherein the plurality of ramp-like elements are disposed in succession along a transverse direction (T) perpendicular to the longitudinal direction (L) and to the intake direction (A); - a manifold , configured to feed the gas to the inlets of the first and second intake ducts of the plurality of ramp-like elements , wherein the first and second intake ducts of the plurality of ramp-like elements are configured to suck the gas and primary air into their respective inlets by the Venturi effect; - for each of the plurality of ramp-like elements , a respective diffuser , disposed at the outlet of the first and of the second intake duct , and defining a plurality of holes from which a flame is generated by combustion of the gas coming from the first and the second intake duct ; - a plate positioned between the first and second consecutive ramp-like elements , wherein the plate defines an opening for the passage of secondary air, <EOS>