The present invention relates to an agricultural machine (1) for working the soil or for sowing seeds having a trailed chassis (2) and working members (3) distributed on a transverse beam (4) comprising a central section (5) provided with wheels (6) and two side sections (7) extending on either side of said central section (5) when working each end of said central section (5) bearing on the ground via a wheel (6). The agricultural machine is characterised in that each side section (7) consists of an extension arm (9) and an intermediate arm (10) said extension arm (9) being linked to said intermediate arm (10) by means of a horizontal hinge (11) having a substantially horizontal axis and directed in the work direction of advance and in that each intermediate arm (10) is connected to said chassis (2) via a vertical hinge (8) and supports at least one working member (3).
