Agricultural machine such as a disk mower, a swather or similar machine, resting at least partly in braced manner on the soil during its use and provided with a working element (2) and with skids (4) designed to slide on the soil, wherein these skids (4) are formed in a lower wall (3) of the said working element (2) or are integral with this lower wall (3), and each skid (4) is provided with a liner (5) having at least one frontal end and a frontal rim on each side of this frontal end. Agricultural machine characterized in that at least one of the frontal rims of the liner (5) of each skid (4) has a relief (12), at least one part of which penetrates into an indentation (13) formed in the corresponding skid (4).
