A high-technology armrest with integrated buttons connected to a command transmission cable for the adjustment of the seat and the seat back movements of an office chair with articulations for the synchronized movement of the seat plane and the seat back. The invention includes a mobile base of the “rocket launcher” type, from which base a column rises, which is adjustable in height, and which supports the seat plane and the reciprocally hinged seat back.A first armrest of the office chair is equipped near the front end with two side-by-side buttons.A second armrest of the office chair, designed symmetrically to the first, is equipped near the front end with a single-control button, for the function of adjusting the height of the chair.