Vehicle with a partitioning wall which can be pivoted in the back of a seat

The vehicle has a seat (30) in an interior cab (10) and a retractable partition (20) with a panel (21). The panel passes between an arrangement position and an isolation position. The panel is retracted between a cushion (50) and rear plate (40) of a back (31) in the arrangement position. The panel is drawn up between plate and roofing (11), by rotating to an upper part of the plate, in the isolation position. The cushion is moved by rotating to lower part of the plate.