Harvesting head for cobs of corn suitable for reaping corn plants in a direction of advancement and in a sense of advancement and comprising: - row separator tips, suitable to convey said corn plants along collection channels, extending substantially in a direction parallel to said direction of advancement, - grooves connected to said row separator tips and defining said collection channels suitable to realise a housing area of said corn plants, when still not cut, - a plurality of harvesting groups, side by side, aligned and extending mainly in said direction of advancement, each of the harvesting groups comprising: - harvesting conveyors suitable to transport said corn plants and said cobs into said collection channels in said direction of advancement and in an opposite direction to said sense of advancement, - de-cobbing plates suitable to separate said cobs from the stem defining a gap along one of said collection channels, - two squeezing rollers, facing said collection channel, suitable to drag said corn plants positioned in said collection channels downwards, so that said cobs are torn upon contact with said de-cobbing plates and transported by said harvesting conveyor, - said facing harvesting groups being surmounted by said grooves and connected to said row separator tips, - said harvesting head further comprising stubble cutter groups suitable to cut said corn plants when placed in said collection channels, - each of said stubble cutter groups comprising: - a hub, rotatable along an axis of rotation not parallel to the horizontal plane arranged under one of said grooves, - at least one rotating blade, connected to said hub and suitable to cut said corn plants, positioned in two of said adjacent channels because of its length, - and said harvesting head being characterised in that - two adjacent of said stubble cutter groups are arranged under two respective said grooves which are not reciprocally adjacent so that all said rotating blades may lie on the same plane. - row separator tips, suitable to convey said corn plants along collection channels, extending substantially in a direction parallel to said direction of advancement, - grooves connected to said row separator tips and defining said collection channels suitable to realise a housing area of said corn plants, when still not cut, - a plurality of harvesting groups, side by side, aligned and extending mainly in said direction of advancement, each of the harvesting groups comprising: - harvesting conveyors suitable to transport said corn plants and said cobs into said collection channels in said direction of advancement and in an opposite direction to said sense of advancement, - de-cobbing plates suitable to separate said cobs from the stem defining a gap along one of said collection channels, - two squeezing rollers, facing said collection channel, suitable to drag said corn plants positioned in said collection channels downwards, so that said cobs are torn upon contact with said de-cobbing plates and transported by said harvesting conveyor, - harvesting conveyors suitable to transport said corn plants and said cobs into said collection channels in said direction of advancement and in an opposite direction to said sense of advancement, - de-cobbing plates suitable to separate said cobs from the stem defining a gap along one of said collection channels, - two squeezing rollers, facing said collection channel, suitable to drag said corn plants positioned in said collection channels downwards, so that said cobs are torn upon contact with said de-cobbing plates and transported by said harvesting conveyor, - said facing harvesting groups being surmounted by said grooves and connected to said row separator tips, - said harvesting head further comprising stubble cutter groups suitable to cut said corn plants when placed in said collection channels, - each of said stubble cutter groups comprising: - a hub, rotatable along an axis of rotation not parallel to the horizontal plane arranged under one of said grooves, - at least one rotating blade, connected to said hub and suitable to cut said corn plants, positioned in two of said adjacent channels because of its length, - and said harvesting head being characterised in that - two adjacent of said stubble cutter groups are arranged under two respective said grooves which are not reciprocally adjacent so that all said rotating blades may lie on the same plane. - a hub, rotatable along an axis of rotation not parallel to the horizontal plane arranged under one of said grooves, - at least one rotating blade, connected to said hub and suitable to cut said corn plants, positioned in two of said adjacent channels because of its length, - and said harvesting head being characterised in that - two adjacent of said stubble cutter groups are arranged under two respective said grooves which are not reciprocally adjacent so that all said rotating blades may lie on the same plane.