Abstract: A chair, in particular a work or office chair, having a seat mounted onto a chair frame. The front region of the seat can be inclined about a horizontal, pivoting shaft which is displaced upwards and downwards, following a spatial guide curve in relation to the chair frame. The seat is also connected in an articulated manner to a rocker which is directed upwards and extends backwards from an articulated rocker bearing fixed to the chair frame and which is connected at a distance from the rear edge of the seat, or at the side of said seat. The chair also includes a backrest which is attached to the section of the rocker that is directed upwards, the inclination of the backrest being disproportionately altered, in a forced manner, with the alteration of the inclination of the seat.