The present invention concerns a single-grain seeder having a chassis that supports at least one seeding element (3) comprising a dispensing housing (7), at least one opening disk (8) for opening a furrow in the ground and at least one depth control wheel (9), said dispensing housing (7) delivering seeds one by one via a rotary dosing element intended to turn about a rotation axis (11), each seed being ejected from the rotary dosing element at an ejection point (12) extending in the lower portion of said rotary dosing element. The single-grain seeder is remarkable in that said ejection point (12) is disposed in the external diameter of said opening disk (8), when viewed along the rotation axis (11) of the rotary dosing element.
