A device for lifting vehicles, comprising: - a stationary structure designed to be supported or anchored on the ground, or embedded in a recess formed in the floor; - a movable structure operatively connected to said stationary structure; - a plurality of arms with one end hinged to said movable structure and a free end with which a pad element designed to come into contact with the vehicle to be lifted is associated; - operation means designed to selectively lift and lower the movable structure with respect to the stationary structure between two predetermined limit positions; - locking means designed to selectively and automatically lock one or more arms of said plurality of arms in the active position; wherein each arm is designed to selectively rotate about a respective substantially vertical hinge axis between an inactive position and an active position wherein said pad element comes into contact with the vehicle; and wherein said locking means comprise a plurality of first locking elements operatively connected to the hinged end of a respective arm, wherein said locking means comprise a plurality of second locking elements placed in proximity to said first locking means; characterized in that said locking means are designed to lock all the arms of said plurality of arms in said active position substantially simultaneously. - a stationary structure designed to be supported or anchored on the ground, or embedded in a recess formed in the floor; - a movable structure operatively connected to said stationary structure; - a plurality of arms with one end hinged to said movable structure and a free end with which a pad element designed to come into contact with the vehicle to be lifted is associated; - operation means designed to selectively lift and lower the movable structure with respect to the stationary structure between two predetermined limit positions; - locking means designed to selectively and automatically lock one or more arms of said plurality of arms in the active position; wherein each arm is designed to selectively rotate about a respective substantially vertical hinge axis between an inactive position and an active position wherein said pad element comes into contact with the vehicle; and wherein said locking means comprise a plurality of first locking elements operatively connected to the hinged end of a respective arm, wherein said locking means comprise a plurality of second locking elements placed in proximity to said first locking means; characterized in that said locking means are designed to lock all the arms of said plurality of arms in said active position substantially simultaneously. wherein each arm is designed to selectively rotate about a respective substantially vertical hinge axis between an inactive position and an active position wherein said pad element comes into contact with the vehicle; and wherein said locking means comprise a plurality of first locking elements operatively connected to the hinged end of a respective arm, wherein said locking means comprise a plurality of second locking elements placed in proximity to said first locking means; characterized in that said locking means are designed to lock all the arms of said plurality of arms in said active position substantially simultaneously.