An agricultural machine for working soil or for sowing seeds, including a trailed chassis and work elements distributed over a transverse beam including a central section including wheels and two side sections extending on either side of the central section during work, each end of the central section resting on the ground via a wheel. Each side section includes an extension arm and an intermediate arm, the extension arm is connected to the intermediate arm by a horizontal articulation with a substantially horizontal axis and is directed in a direction of advance at work and each intermediate arm is connected to the chassis via a vertical articulation and carries at least one work element.
