A farm vehicle includes a seat that converts between sitting and kneeling positions. The seat has three cushions: a first one to support a user's chest and head, a second to supports his knees, and a central cushion that pivots transversely between a lowered position and a raised position. In the lower position, the third cushion supports the user's pelvis in the kneeling position. In the raised position, the third cushion forms a sitting part in a sitting position. The slide-way comprises a supporting slide-way that allows translation of the seat in a direction of travel. The seat is mounted on a base that pivots on the slide-way to allow the first, second, and third cushions to pivot about a vertical pivot axis of the farm vehicle.
