Agricultural machine comprising a plurality of drilling units, each (2) comprising a support device (21), a seed metering device (8) to distribute seeds to a drill furrow (9a) in the ground (9) across which the agricultural machine (1) moves, wherein each drilling unit (2) is movably connected with a structural member (3) of the agricultural machine and the seed metering device (8) is fixedly connected with the support device (21) of the drilling unit (2), the seed metering device (8) comprising a seed metering element (803) that, by means of a driving device, is arranged to transport seeds to a seed metering line (812), a chamber (882) for seeds (92), which chamber (882) is arranged to be supplied with a positive pressure from a pressure-creating member (880) of the agricultural machine, wherein the seed metering element (803) constitutes a wall limiting the chamber (882) and has holes (804) or recesses, which connect the chamber (882) with the surroundings to develop a pressure difference and thereby attach and transport seeds at said holes/recesses (804) of the seed metering element (803), characterized in that the seed metering line (812) has an inlet (814) in the chamber (882), wherein an air flow out of the seed metering device through the seed metering line (812) is created by said positive pressure in the chamber (882), the inlet (814) of the seed metering line is arranged in close connection to a reception area (818) on a seed-carrying side (803a) of the seed metering element (803), the seed metering device (8) has a pressure equalizing means (808) at the reception area (818) and configured to at the reception area (818) eliminate the pressure difference across the holes/recesses (804) and thereby also the force trapping the seed, whereby the seed falls from the seed metering element to the inlet of the seed metering line until the seed is accelerated by the air flow and transported from the chamber (882) through the seed metering line (812) to the drill fu
