A vehicle chassis includes a core of synthetic foam having an elongate shape with a length, greater than a width, defining a longitudinal direction; an upper plate, its surface substantially matching the surface of the core; and a lower plate, its surface substantially matching the surface of the core. The core is sandwiched between the upper plate and the lower plate while being rigidly connected thereto, and is reinforced by at least one metal tube arranged longitudinally over a portion of the length of the core.