Safety cage device for vehicles, in particular for off-road vehicles, the safety cage device being configured to make a substantially rigid structural element intended for the reinforcement and protection of a vehicle, wherein said safety cage device comprises: - at least a first support arch extending at least partially and mainly along a first direction and along a second direction transversal to the first direction, - a front frame and - a first plurality of reinforcing elements, the reinforcing elements of said first plurality being positioned between the first support arch and the front frame, wherein said front frame is configured to integrate and/or replace a windscreen frame of the vehicle, wherein said safety cage device comprises at least a first pass-through hole or a first bracket or a first pair of brackets at a lower right portion of said front frame and a second pass-through hole or a second bracket or a second pair of brackets at a lower left portion of said front frame, in order to anchor said safety cage device to the frame of said vehicle in correspondence to said front frame, and wherein the first support arch comprises a crossbeam which has a length such as to cross, in use, a roof of the bodywork of the vehicle, the first support arch being configured to lie, in use, in substantial alignment with central uprights of the bodywork of the vehicle, characterised in that the reinforcing elements of said first plurality are crossed, the reinforcing elements of said first plurality being configured to structurally constrain the crossbeam of the first support arch to the front frame substantially at a roof of the bodywork of the vehicle, and in that the safety cage device comprises a second plurality of crossed reinforcing elements, positioned between the first support arch and a second support arch and configured to structurally constrain a crossbeam of the second support arch to the crossbeam of the first support arch. - at least a first support arch extending at least partially and mainly along a first direction and along a second direction transversal to the first direction, - a front frame and - a first plurality of reinforcing elements, the reinforcing elements of said first plurality being positioned between the first support arch and the front frame, wherein said front frame is configured to integrate and/or replace a windscreen frame of the vehicle, wherein said safety cage device comprises at least a first pass-through hole or a first bracket or a first pair of brackets at a lower right portion of said front frame and a second pass-through hole or a second bracket or a second pair of brackets at a lower left portion of said front frame, in order to anchor said safety cage device to the frame of said vehicle in correspondence to said front frame, and wherein the first support arch comprises a crossbeam which has a length such as to cross, in use, a roof of the bodywork of the vehicle, the first support arch being configured to lie, in use, in substantial alignment with central uprights of the bodywork of the vehicle, characterised in that the reinforcing elements of said first plurality are crossed, the reinforcing elements of said first plurality being configured to structurally constrain the crossbeam of the first support arch to the front frame substantially at a roof of the bodywork of the vehicle, and in that the safety cage device comprises a second plurality of crossed reinforcing elements, positioned between the first support arch and a second support arch and configured to structurally constrain a crossbeam of the second support arch to the crossbeam of the first support arch.