Header work wagon (1), which is suitable to be arranged at the head of a work train consisting of one or more work wagons (2) for the creation and / or reconditioning of a railway section consisting of an infrastructure , as well as on some tracks, where the work wagons (2) of the work train each have a lower conveyor belt that can be operated in a reversible manner, as well as at least one end a belt transfer conveyor for the transfer of material from a work car (2) to the next work car (2), where the head work car (1) has a lower conveyor belt (3) and a conveyor belt of load (5) with loading hopper (7), the load conveyor belt (5) being arranged linearly movable in its head and roof regions of a front end of the head work wagon (1), for positioning exact of a transfer region of the loading conveyor belt (5) with respect to a place of extraction of old materials, characterized in that the lower conveyor belt (3) can be reversibly operated to load and unload materials and is movable in the longitudinal extent of the head work car (1), because the loading conveyor belt (5) can be reversibly operated to load and unload materials in the head side region of the front side, and because the head work car (1) has at its front end a transfer conveyor belt (4) that can be operated in a reversible way, which is associated with the lower conveyor belt (3) and which is suitable for loading and unloading materials in the head region, wherein, with the head work wagon (1) arranged at the head of the work train, on the one hand, the lower conveyor belt (3), the belt tra associated transfer conveyor (4) and the load conveyor belt (5) of the head work wagon (1) and, on the other hand, the lower conveyor belts and the transfer conveyor belts of the work wagons (2), They can be positioned, each one of them optionally in terms of the relative arrangement between them as well as in terms of their transport device, so that, alternatively or simultaneously, the work train with its work wagons (2) can be loaded with material removed by means of the head work car (1) and / or the work train with new material loaded in the work cars (2) can be unloaded by means of the head work car (1) .
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