Abstract: This invention reveals a corn harvester header comprising: multiple harvesting units placed adjacently among them, where each of said harvesting units has a central slot through where a maize plant is processed to separate the ears from the stalks; multiple crop divisors, each placed between two adjacent harvesting units; and multiple frontal devices, each place in front of and between two adjacent harvesting units; where each one of said multiple frontal devices comprise: a pair of guiding elements, where the guiding element is selected from a group of: chain or belt; two or more wheels; and a support; where the guiding element is placed around said two or more wheels; where one of the two or more wheels drives the spin of the guiding element, where the tangential speed of the guiding element is configured according to the distance between the plants in the crop; and where an opening greater that the harvesting slot is created.