<p>The self driving harvester comprises a cutting mechanism (1), a threshing device and a corn/straw mixture dividing device. The threshing device is arranged in a pivotable housing (5) and is removably connected to the cutting mechanism. A pneumatic conveying device is arranged underneath the output discharge area of the threshing device. An air through flowing gap section (16) is closed onto the discharge area of the conveying device. A sieve is arranged underneath this gap section. Underneath the output area is arranged a separator drum (33) or a free opening to the ground.</p>