A zero gravity chair mechanism includes a frame having a bottom wall and a pair of vertical side walls; a carriage slidable longitudinally of the bottom wall; a linear actuator for moving the carriage longitudinally of the frame; link arms connected to the carriage for movement with the carriage, front ends of the link arms being connected to chair seat support brackets for moving the brackets longitudinally of the frame, the rear of the brackets moving horizontally while the rear of the brackets move upwardly and rearwardly relative to the frame or downwardly and forwardly relative to the frame, whereby the chair moves between a horizontal position and a zero gravity position. During movement from the zero gravity to the horizontal positions, the back of the chair moves downwardly and forwardly relative to the frame.