A stalked crop harvesting header comprising multiple harvesting units each comprising a pair of deck plates defining a channel, a pair of snapping rollers mounted below the deck plates and adapted to pull stalks downwardly through the channel, a pair of gathering chains provided with cams, the gathering chains extending between a first pair of gears located at a front end of the harvesting unit and a second pair of gears located at a back end of the harvesting unit, wherein each harvesting unit further comprises a pair of stalk guiders positioned to rotate around axes coinciding with respective axes of the first pair of gears, wherein the stalk guiders each comprise an upper stalk guiding wheel and a lower stalk guiding wheel which are interconnected, and wherein a cutting element is provided below the lower stalk guiding wheel to cut stalks while being guided by the stalk guider.