Chair, particularly office-chair

In a chair (1), in particular an office chair, with a backrest (5) hinged to a seat support (3) via a backrest support (4) and with a seat surface (6) which can be moved synchronously therewith, the front region (6a) of which is guided by a sliding guide (8) and the rear region (6b) is connected to the seat support (3) via a seat link (7), the distance (a) of the upper pivot point (D3) connecting the seat link (7) to the seat surface (6) Backrest (5) is smaller than the distance (b) of the seat link (7) with the seat support (3) connecting lower pivot point (D2) to the backrest (5). For synchronization between the movement of the backrest (5) and the movement of the seat surface (6) a sliding guide (10) of the seat surface (6) in the backrest support (4) is provided.