A spreading boom (2), for instance in the form of a so-called drip hose boom, for slurry wagons and trailers (1) is disclosed, wherein the side wings (8) of the boom are mounted on respective parts of a divided main frame (4), the two parts of which are hinged to one another in a hinge (3) having a substantially horizontal hinge axis and are furthermore connected to each other by one or more hydraulic cylinders (7) in such a way that the two frame parts can be rotated relatively to each other about the hinge axis in a substantially vertical plane, so that one or both side wings are tilted upwards by this rotation, the outer part of the side wing(s) being lifted relatively to the inner part. Furthermore, a slurry wagon or trailer (1) with such a spreading boom is disclosed.
