Abstract: Device for assembly and disassembly of protective helmet visors, such visor being of the type presenting a hinge inwards the inner visor face, one on each visor extreme. The device includes a base component developed to be robustly linked to the protective helmet and a first recess developed to consent the insertion of the visor hinge into such recess. It also includes blocking components interacting with the hinge. At the same time the lever, inserted into the base, has a relative movement with respect to the base between the visor blocking position and visor opening position.