A vehicle chair (10) has a seat cushion frame (20) that is united by a forward pivot joint (A) with a forward support (30) and united by a rear pivot joint (B) with a backrest frame (40). The backrest frame (40) is united by a rear, lower pivot joint (C) with a rear support (50) and is formed by upper and lower parts (42, 44) that can be displaced relative to each other. The chair has also slide rails (80, 80) that can be anchored to the floor of a vehicle cabin, which join by bearings and in a manner that allows displacement of the forward support (30) and of the rear support (50). In order temporarily to provide more space in front of or behind the chair, the pivot joints (A, B, C), the parts (42, 44) of the backrest frame (40) that can be displaced and the slide rails (80, 80, 80) are arranged in such a manner that when the upper part (42) of the backrest frame is displaced upwards relative to its lower part (44) past a position of the chair at which it can be used for sitting, not only can the supports (30, 50) be displaced relative to each other along the slide rails (80, 80), but also can the seat cushion frame (20) be tilted forwards to such an extent that the chair (10) takes up a flat, upright configuration.