Chair, particularly office-chair

In a chair (1), in particular an office chair, with a backrest support (4) on a seat support (3) hinged to the backrest (5) and a synchronism therewith moveable seat surface (6) whose front portion (6a) via a sliding guide (8) and whose rear region (6b) via a seat link (7) with the seat carrier (3) is connected, the distance (a) of the seat link (7) with the seat surface (6) joining the upper pivot point (D3) is at the backrest (5) is smaller than the distance (b) of the seat link (7) joined to the seat support (3) the 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.