Harvesting head with a flexible cutter bar with a rigid central section this invention refers to a harvesting machine that includes a picker peeler (40),With a frame of peeler (42),A cutter bar set (48) fixed to the peeler frame along the length of the peeler and configured to cut a sapphire, and a harvester set (50) positioned behind the cutter and operable toolbar assembly to receive Cut Sapphire material from the toolbar assembly Cutter. The whole harvesting area includes a longitudinal harvester (54), which provides sapphire material towards the rear to a feed chamber of the harvesting machine and side harvesting (52) spaced opposite,Providing crop material laterally to the central harvester. The cutter set (48) and the harvester set (50) are operable for flexing and thus follow a rough terrain. Longitudinal harvesting includes a harvesting frame (244, 252, 256) which is supported in an oscillating manner in the dehydrator frame (42) at a pivot (254),To point out from the same front and with a harvesting strap (250) sustained in the harvesting frame, to present a course with movement towards the rear, to transport the crop towards the rear. The harvesting frame has a front margin (256, 258),Which is attached to the cutter assembly (48) adjacent to the front margin, so that the harvesting frame (244, 252, 256) is led to oscillate relative to the peeling frame when the cutter set flexes up and down. The cut -bar assembly (48) is relatively inflexible along a section (282) defined between laterally external margins of the longitudinal harvester in which the front margin (256, 258) of the harvesting frame and, in general, the whole section of the cut -bar assembly moves - Together, when the harvesting frame (244, 252, 256) oscillates in relation to the peeler frame (42).cabeça colheitadeira com uma barra cortadora flexível com uma seção central rígida a presente invenção refere-se a uma máquina colheitadeira que inclui um descabeçador colhedor (40), com uma armação