The present invention relates to a chassis (1) carrying soil working tools (27) resting on main carrying wheels (12) in constant contact with the ground (S), and comprising a central boom (10) a chassis body ( 10 ') secured to one end of said boom (10), a central rear section (13) extending perpendicularly to the longitudinal axis of said central boom (10), and extending from the rear end of said body a frame (10 ') towards the rear of said frame (1) in the longitudinal axis of said boom (10), and being movably mounted with respect to said frame body (10') between at least:a retracted position in which said central rear section (13) is remote from the rear end of said frame body (10 '), andan advanced position in which said central rear section (13) is brought closer to the rear end of said frame body (10 '), two lateral rear sections (11) integral with said frame body (10') being movably mounted by report to said chassis body (10 ') between at least:a transport position in which said lateral rear sections (11) are folded substantially along said arrow (10), anda working position in which said rear lateral sections (11) are separated from said boom (10) and extend on either side of said central rear section (13) essentially in the extension thereof, said wheels main carriers (12), while remaining in contact with the ground (S), are movable relative to said chassis body (10 ') between at least:a lowered position in which the distance between said frame body (10 ') and the ground (S) is reduced, the frame thus being in the working position, and- A raised position in which the distance between said frame body (10 ') and the ground (S) is increased, the frame thus being in a maneuvering or transport position. La présente invention concerne un châssis (1) porte outils de travail du sol (27) reposant sur des roues porteuses principales (12) en contact constant avec le sol (S), et comprenant une flèche centrale (10) un corps de châssis (10') solidaire d'un
