A bending machine comprises a frame (10), having a main side (10'); a bending head in said main side and including three bender rollers (11, 12, 13), two rollers (11, 12) of said three bender rollers having fixed axes of rotation, one roller (13) of said three rollers having a vertically displaceable axis of rotation and being mounted on a slider (13') which is movable along a vertical rectilinear guide (13'a); a motor and reduction gear unit (27) driving one or more of said bender rollers (11, 12, 13); thrust rolls (14, 15), and a driving means for the displacement of said slider (13'). This driving means includes a reduction gear mounted on a free work surface (C) and provided with means for the mechanical interface connection to said slider (13'). IMAGE
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