Seat

A seat comprising a frame section and a seat section and backrest arranged thereon. The frame section is arranged movably in the back and forth direction to the base of the seat, whereby the backrest is pivotally connected to the frame section by a first lever structure for adjusting the tilt of the backrest. A second lever structure is pivotally connected to the frame section, and in one position it is arranged to lock the frame section to the base and in another position to release the frame section to move back and forth for longitudinal adjustment of the seat. The seat comprises an adjustment means arranged to affect both the first and the second lever structure so that moving it in one way is arranged to affect the first and moving it in another way is arranged to affect the second lever structure.