Abstract: A chair, especially useful for children with cerebral palsy, which has a board-type backrest integral with a board-type seat which are mounted on suitable legs that have adjustment means to adjust the height of the seat. The backrest is provided with a chest strap for strapping a child's chest erect. Means are provided for moving the chest strap vertically along the backrest. Arm rests are adjustably fastened to the backrest to be adjusted in and out, and up and down. The seat is provided with a post to inhibit leg adduction and is movable towards and away from the backrest.