Gooseneck semi-trailer

A semi-trailer for transporting containers which are connected to a tractor unit, comprising a goose-neck chassis and a container lifting device with a forward crane part and a rearward crane part each of which are displaceable along the goose-neck chassis, the goose-neck chassis comprising two chassis portions positioned one behind the other, each having a top portion, whereby said top portions are positioned vertically displaced relative to each other, wherein one of the crane parts is connected to a linearly operating, longitudinally variable elongate actuator, and a displacement of the crane part connected to the elongate actuator takes place by means of the linearly operating, longitudinally variable elongate actuator, which both in a retracted and in an extended state is positioned substantially below said top portions and has a substantially constant angle to the goose-neck chassis, a vertically pivotable link arm being connected at one end to a driving part of the elongate actuator and at an other end pivotably connected to said crane part connected to the elongate actuator.