Vehicle trailer

The trailer (1) has a chassis frame (2), and a fixed structure (6) enclosing an inner area (10) of the trailer. The fixed structure comprises a base (8), a side structure wall (9) and a roof (7). The fixed structure has a lateral and upwardly tapered front area (15) with planar front walls at the structure wall and at the roof. The roof is designed in a hood-shape and made from plastic. A circular beam is formed between the structure wall and the roof, and has a circulating retaining profile (28) for the structure wall and the roof.