A patient chair (1) has a chassis (2) with a frame (3), a seating device (6,7) intended for the patient and connected to the chassis, and a driving device(9) for moving the seating device (6, 7) relative to the frame (3) in thevertical direction between a lower posi~tion (LP) and an upper position (HP),in which upper position the seating device (6, 7) and, thus, a patient sittingin it are inclined backwards relative to the lower position. A stand (4)belonging to the chassis (2) extends upwards from the frame (3), and anelement (4, 7) connected to the stand (4) is continuously arched. Means (4, 7,8) cooperating with each other and positioned on the stand (4, 7) and theseating device (6, 7) are arranged to guide the seating device along theelement (4, 7) in the movement of the seating device between the lower andupper positions (LP, HP), so that the seating device (6, 7) is continuouslygradually tilted in the course of its curved movement in the verticaldirection.
