Abstract: An impregnating machine (1, 28) for surface impregnating hides (2) or similar products wherein an endless conveyor belt (3), with a transportation branch (5) traveling in a given direction (6), and a conveyor (16), presenting a number of endless belts (17), define a feed channel (19) for the hides (2); the feed channel (19) extending substantially up to a narrow passage (13) for the conveyor belt (3) and the hides (2); and the passage (13) being defined between an impregnating roller (11) and a deflecting member (7) facing the impregnating roller (11) and such as to impart to the transportation branch (5) of the conveyor belt (3) a radius of curvature (R1) equal to a relatively small fraction of the radius (R2) of the impregnating roller (11).