Active anti-roll bar

The present invention relates to an active anti-roll device for automotive vehicles, comprising a stabilizer bar (5) comprising a central part (8) which is articulated in at least two supports (13) to a cradle (12) or to the frame of an automotive vehicle, said central part (8) prolonging beyond each support (13) in a cantilever part (7), each cantilever part (7) being bent into a lever arm (6) connecting at its end, at a connection point (9), with a connection bar (14) which at its opposite end connects with an intermediate element capable of transmitting reaction forces of the stabilizer bar (5) to the wheels of the automotive vehicle, where the device comprises means for modifying the bending and torsional stress generated in the stabilizer bar (5) while driving.