Abstract: A burner for an oven or grill may include a flat and elongated body extending in a major longitudinal direction and confining an inner chamber configured to receive a comburent and combustible mixture. The body may include two half-shells mutually superposed and coupled in mirror-image relationship and including edge portions defining a coupling plane. A first series of flame holes may define a first flaming front and a second series of flame holes may define a second flaming front, at the coupling plane, on opposite sides of the inner chamber. The body may include a connecting portion between the first and second flaming fronts at an end of the inner chamber. The connecting portion may be defined by connecting walls of the half-shells extending parallel to the coupling plane in a sequence of depressions and elevations between the first and second flaming fronts and configured to transfer flame.